diff --git a/packages/server/src/constants/event-tracker.ts b/packages/server/src/constants/event-tracker.ts
index b033abe8c..12a89d6bd 100644
--- a/packages/server/src/constants/event-tracker.ts
+++ b/packages/server/src/constants/event-tracker.ts
@@ -13,15 +13,19 @@ export const SALE_ESTIMATE_EDITED = 'Sale estimate edited';
 export const SALE_ESTIMATE_DELETED = 'Sale estimate deleted';
 export const SALE_ESTIMATE_PDF_VIEWED = 'Sale estimate PDF viewed';
 export const SALE_ESTIMATE_VIEWED = 'Sale estimate viewed';
+export const SALE_ESTIMATE_MAIL_SENT = 'Sale estimate mail sent';
 
 export const PAYMENT_RECEIVED_CREATED = 'Payment received created';
 export const PAYMENT_RECEIVED_EDITED = 'payment received edited';
 export const PAYMENT_RECEIVED_DELETED = 'Payment received deleted';
 export const PAYMENT_RECEIVED_PDF_VIEWED = 'Payment received PDF viewed';
+export const PAYMENT_RECEIVED_MAIL_SENT = 'Payment received mail sent';
 
 export const SALE_RECEIPT_PDF_VIEWED = 'Sale credit PDF viewed';
+export const SALE_RECEIPT_MAIL_SENT = 'Sale credit mail sent';
 
 export const CREDIT_NOTE_PDF_VIEWED = 'Credit note PDF viewed';
+export const CREDIT_NOTE_MAIL_SENT = 'Credit note mail sent';
 
 export const BILL_CREATED = 'Bill created';
 export const BILL_EDITED = 'Bill edited';
diff --git a/packages/server/src/interfaces/Mailable.ts b/packages/server/src/interfaces/Mailable.ts
index 7412f2079..c77895225 100644
--- a/packages/server/src/interfaces/Mailable.ts
+++ b/packages/server/src/interfaces/Mailable.ts
@@ -36,7 +36,7 @@ export interface CommonMailOptions {
   to: Array<string>;
   cc?: Array<string>;
   bcc?: Array<string>;
-  data?: Record<string, any>;
+  formatArgs?: Record<string, any>;
 }
 
 export interface CommonMailOptionsDTO extends Partial<CommonMailOptions> {
diff --git a/packages/server/src/services/EventsTracker/events/PaymentReceivedEventsTracker.ts b/packages/server/src/services/EventsTracker/events/PaymentReceivedEventsTracker.ts
index eb6d5dc39..9d45c3dde 100644
--- a/packages/server/src/services/EventsTracker/events/PaymentReceivedEventsTracker.ts
+++ b/packages/server/src/services/EventsTracker/events/PaymentReceivedEventsTracker.ts
@@ -12,6 +12,7 @@ import {
   PAYMENT_RECEIVED_EDITED,
   PAYMENT_RECEIVED_DELETED,
   PAYMENT_RECEIVED_PDF_VIEWED,
+  PAYMENT_RECEIVED_MAIL_SENT,
 } from '@/constants/event-tracker';
 
 @Service()
@@ -39,6 +40,10 @@ export class PaymentReceivedEventsTracker extends EventSubscriber {
       events.paymentReceive.onPdfViewed,
       this.handleTrackPdfViewedPaymentReceivedEvent
     );
+    bus.subscribe(
+      events.paymentReceive.onMailSent,
+      this.handleTrackMailSentPaymentReceivedEvent
+    );
   }
 
   private handleTrackPaymentReceivedCreatedEvent = ({
@@ -80,4 +85,14 @@ export class PaymentReceivedEventsTracker extends EventSubscriber {
       properties: {},
     });
   };
+
+  private handleTrackMailSentPaymentReceivedEvent = ({
+    tenantId,
+  }: IPaymentReceivedDeletedPayload) => {
+    this.posthog.trackEvent({
+      distinctId: `tenant-${tenantId}`,
+      event: PAYMENT_RECEIVED_MAIL_SENT,
+      properties: {},
+    });
+  };
 }
diff --git a/packages/server/src/services/EventsTracker/events/SaleEstimateEventsTracker.ts b/packages/server/src/services/EventsTracker/events/SaleEstimateEventsTracker.ts
index 263044bff..25c97e4a3 100644
--- a/packages/server/src/services/EventsTracker/events/SaleEstimateEventsTracker.ts
+++ b/packages/server/src/services/EventsTracker/events/SaleEstimateEventsTracker.ts
@@ -13,6 +13,7 @@ import {
   SALE_ESTIMATE_DELETED,
   SALE_ESTIMATE_PDF_VIEWED,
   SALE_ESTIMATE_VIEWED,
+  SALE_ESTIMATE_MAIL_SENT,
 } from '@/constants/event-tracker';
 
 @Service()
@@ -44,6 +45,10 @@ export class SaleEstimateEventsTracker extends EventSubscriber {
       events.saleEstimate.onViewed,
       this.handleTrackViewedEstimateEvent
     );
+    bus.subscribe(
+      events.saleEstimate.onMailSent,
+      this.handleTrackMailSentEstimateEvent
+    );
   }
 
   private handleTrackEstimateCreatedEvent = ({
@@ -93,4 +98,12 @@ export class SaleEstimateEventsTracker extends EventSubscriber {
       properties: {},
     });
   };
+
+  private handleTrackMailSentEstimateEvent = ({ tenantId }) => {
+    this.posthog.trackEvent({
+      distinctId: `tenant-${tenantId}`,
+      event: SALE_ESTIMATE_MAIL_SENT,
+      properties: {},
+    });
+  };
 }
diff --git a/packages/server/src/services/MailNotification/ContactMailNotification.ts b/packages/server/src/services/MailNotification/ContactMailNotification.ts
index 725e28821..d798adce5 100644
--- a/packages/server/src/services/MailNotification/ContactMailNotification.ts
+++ b/packages/server/src/services/MailNotification/ContactMailNotification.ts
@@ -46,7 +46,7 @@ export class ContactMailNotification {
    * @param {number} tenantId - Tenant id.
    * @returns {Promise<CommonMailOptions>}
    */
-  public async parseMailOptions(
+  public async formatMailOptions(
     tenantId: number,
     mailOptions: CommonMailOptions,
     formatterArgs?: Record<string, any>
diff --git a/packages/server/src/services/MailNotification/utils.ts b/packages/server/src/services/MailNotification/utils.ts
index 115a01313..63e9550ba 100644
--- a/packages/server/src/services/MailNotification/utils.ts
+++ b/packages/server/src/services/MailNotification/utils.ts
@@ -44,3 +44,13 @@ export function validateRequiredMailOptions(
     throw new ServiceError(ERRORS.MAIL_BODY_NOT_FOUND);
   }
 }
+
+export const mergeAndValidateMailOptions = (
+  mailOptions: CommonMailOptions,
+  overridedOptions: Partial<CommonMailOptions>
+): CommonMailOptions => {
+  const parsedMessageOptions = parseMailOptions(mailOptions, overridedOptions);
+  validateRequiredMailOptions(parsedMessageOptions);
+
+  return parsedMessageOptions;
+};
diff --git a/packages/server/src/services/Sales/Estimates/SendSaleEstimateMail.ts b/packages/server/src/services/Sales/Estimates/SendSaleEstimateMail.ts
index 0ac580b90..697a4993e 100644
--- a/packages/server/src/services/Sales/Estimates/SendSaleEstimateMail.ts
+++ b/packages/server/src/services/Sales/Estimates/SendSaleEstimateMail.ts
@@ -13,9 +13,10 @@ import {
   SaleEstimateMailOptionsDTO,
 } from '@/interfaces';
 import { ContactMailNotification } from '@/services/MailNotification/ContactMailNotification';
-import { parseAndValidateMailOptions } from '@/services/MailNotification/utils';
+import { mergeAndValidateMailOptions } from '@/services/MailNotification/utils';
 import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
 import events from '@/subscribers/events';
+import { transformEstimateToMailDataArgs } from './utils';
 
 @Service()
 export class SendSaleEstimateMail {
@@ -65,23 +66,17 @@ export class SendSaleEstimateMail {
   }
 
   /**
-   * Formates the text of the mail.
+   * Formate the text of the mail.
    * @param {number} tenantId - Tenant id.
    * @param {number} estimateId - Estimate id.
    * @returns {Promise<Record<string, any>>}
    */
-  public formatterData = async (tenantId: number, estimateId: number) => {
+  public formatterArgs = async (tenantId: number, estimateId: number) => {
     const estimate = await this.getSaleEstimateService.getEstimate(
       tenantId,
       estimateId
     );
-    return {
-      CustomerName: estimate.customer.displayName,
-      EstimateNumber: estimate.estimateNumber,
-      EstimateDate: estimate.formattedEstimateDate,
-      EstimateAmount: estimate.formattedAmount,
-      EstimateExpirationDate: estimate.formattedExpirationDate,
-    };
+    return transformEstimateToMailDataArgs(estimate);
   };
 
   /**
@@ -92,7 +87,9 @@ export class SendSaleEstimateMail {
    */
   public getMailOptions = async (
     tenantId: number,
-    saleEstimateId: number
+    saleEstimateId: number,
+    defaultSubject: string = DEFAULT_ESTIMATE_REMINDER_MAIL_SUBJECT,
+    defaultMessage: string = DEFAULT_ESTIMATE_REMINDER_MAIL_CONTENT
   ): Promise<SaleEstimateMailOptions> => {
     const { SaleEstimate } = this.tenancy.models(tenantId);
 
@@ -100,22 +97,45 @@ export class SendSaleEstimateMail {
       .findById(saleEstimateId)
       .throwIfNotFound();
 
-    const formatterData = await this.formatterData(tenantId, saleEstimateId);
+    const formatArgs = await this.formatterArgs(tenantId, saleEstimateId);
 
-    const mailOptions = await this.contactMailNotification.getMailOptions(
-      tenantId,
-      saleEstimate.customerId,
-      DEFAULT_ESTIMATE_REMINDER_MAIL_SUBJECT,
-      DEFAULT_ESTIMATE_REMINDER_MAIL_CONTENT,
-      formatterData
-    );
+    const mailOptions =
+      await this.contactMailNotification.getDefaultMailOptions(
+        tenantId,
+        saleEstimate.customerId
+      );
     return {
       ...mailOptions,
-      data: formatterData,
+      message: defaultMessage,
+      subject: defaultSubject,
       attachEstimate: true,
+      formatArgs,
     };
   };
 
+  /**
+   * Formats the given mail options.
+   * @param {number} tenantId
+   * @param {number} saleEstimateId
+   * @param {SaleEstimateMailOptions} mailOptions
+   * @returns {Promise<SaleEstimateMailOptions>}
+   */
+  public formatMailOptions = async (
+    tenantId: number,
+    saleEstimateId: number,
+    mailOptions: SaleEstimateMailOptions
+  ): Promise<SaleEstimateMailOptions> => {
+    const formatterArgs = await this.formatterArgs(tenantId, saleEstimateId);
+
+    const formattedOptions =
+      await this.contactMailNotification.formatMailOptions(
+        tenantId,
+        mailOptions,
+        formatterArgs
+      );
+    return { ...formattedOptions };
+  };
+
   /**
    * Sends the mail notification of the given sale estimate.
    * @param {number} tenantId
@@ -133,27 +153,52 @@ export class SendSaleEstimateMail {
       saleEstimateId
     );
     // Overrides and validates the given mail options.
-    const messageOpts = parseAndValidateMailOptions(
+    const parsedMessageOptions = mergeAndValidateMailOptions(
       localMessageOpts,
       messageOptions
+    ) as SaleEstimateMailOptions;
+
+    const formattedOptions = await this.formatMailOptions(
+      tenantId,
+      saleEstimateId,
+      parsedMessageOptions
     );
     const mail = new Mail()
-      .setSubject(messageOpts.subject)
-      .setTo(messageOpts.to)
-      .setContent(messageOpts.body);
+      .setSubject(formattedOptions.subject)
+      .setTo(formattedOptions.to)
+      .setContent(formattedOptions.message);
+
+    // Attaches the estimate pdf to the mail.
+    if (formattedOptions.attachEstimate) {
+      // Retrieves the estimate pdf and attaches it to the mail.
+      const [estimatePdfBuffer, estimateFilename] =
+        await this.estimatePdf.getSaleEstimatePdf(tenantId, saleEstimateId);
 
-    if (messageOpts.attachEstimate) {
-      const estimatePdfBuffer = await this.estimatePdf.getSaleEstimatePdf(
-        tenantId,
-        saleEstimateId
-      );
       mail.setAttachments([
         {
-          filename: messageOpts.data?.EstimateNumber || 'estimate.pdf',
+          filename: `${estimateFilename}.pdf`,
           content: estimatePdfBuffer,
         },
       ]);
     }
+
+    const eventPayload = {
+      tenantId,
+      saleEstimateId,
+      messageOptions,
+      formattedOptions,
+    };
+    // Triggers `onSaleEstimateMailSend` event.
+    await this.eventPublisher.emitAsync(
+      events.saleEstimate.onMailSend,
+      eventPayload as ISaleEstimateMailPresendEvent
+    );
     await mail.send();
+
+    // Triggers `onSaleEstimateMailSent` event.
+    await this.eventPublisher.emitAsync(
+      events.saleEstimate.onMailSent,
+      eventPayload as ISaleEstimateMailPresendEvent
+    );
   }
 }
diff --git a/packages/server/src/services/Sales/Estimates/constants.ts b/packages/server/src/services/Sales/Estimates/constants.ts
index b42d66763..798e8f090 100644
--- a/packages/server/src/services/Sales/Estimates/constants.ts
+++ b/packages/server/src/services/Sales/Estimates/constants.ts
@@ -1,16 +1,16 @@
 export const DEFAULT_ESTIMATE_REMINDER_MAIL_SUBJECT =
-  'Estimate {EstimateNumber} is awaiting your approval';
-export const DEFAULT_ESTIMATE_REMINDER_MAIL_CONTENT = `<p>Dear {CustomerName}</p>
+  'Estimate {Estimate Number} is awaiting your approval';
+export const DEFAULT_ESTIMATE_REMINDER_MAIL_CONTENT = `<p>Dear {Customer Name}</p>
 <p>Thank you for your business, You can view or print your estimate from attachements.</p>
 <p>
-Estimate <strong>#{EstimateNumber}</strong><br />
-Expiration Date : <strong>{EstimateExpirationDate}</strong><br />
-Amount   : <strong>{EstimateAmount}</strong></br />
+Estimate <strong>#{Estimate Number}</strong><br />
+Expiration Date : <strong>{Estimate Expiration Date}</strong><br />
+Amount   : <strong>{Estimate Amount}</strong></br />
 </p>
 
 <p>
 <i>Regards</i><br />
-<i>{CompanyName}</i>
+<i>{Company Name}</i>
 </p>
 `;
 
diff --git a/packages/server/src/services/Sales/Estimates/utils.ts b/packages/server/src/services/Sales/Estimates/utils.ts
index 9c7d92de5..efd301af3 100644
--- a/packages/server/src/services/Sales/Estimates/utils.ts
+++ b/packages/server/src/services/Sales/Estimates/utils.ts
@@ -22,3 +22,13 @@ export const transformEstimateToPdfTemplate = (
     customerAddress: contactAddressTextFormat(estimate.customer),
   };
 };
+
+export const transformEstimateToMailDataArgs = (estimate: any) => {
+  return {
+    'Customer Name': estimate.customer.displayName,
+    'Estimate Number': estimate.estimateNumber,
+    'Estimate Date': estimate.formattedEstimateDate,
+    'Estimate Amount': estimate.formattedAmount,
+    'Estimate Expiration Date': estimate.formattedExpirationDate,
+  };
+};
diff --git a/packages/server/src/services/Sales/Invoices/GetInvoicePaymentMail.ts b/packages/server/src/services/Sales/Invoices/GetInvoicePaymentMail.ts
index 4a41b3f26..4e13e7d02 100644
--- a/packages/server/src/services/Sales/Invoices/GetInvoicePaymentMail.ts
+++ b/packages/server/src/services/Sales/Invoices/GetInvoicePaymentMail.ts
@@ -21,6 +21,7 @@ export class GetInvoicePaymentMail {
 
   /**
    * Retrieves the mail template attributes of the given invoice.
+   * Invoice template attributes are composed of the invoice and branding template attributes.
    * @param {number} tenantId - Tenant id.
    * @param {number} invoiceId - Invoice id.
    */
diff --git a/packages/server/src/services/Sales/Invoices/SendInvoiceInvoiceMailCommon.ts b/packages/server/src/services/Sales/Invoices/SendInvoiceInvoiceMailCommon.ts
index 16ee5bd9f..4edfe3464 100644
--- a/packages/server/src/services/Sales/Invoices/SendInvoiceInvoiceMailCommon.ts
+++ b/packages/server/src/services/Sales/Invoices/SendInvoiceInvoiceMailCommon.ts
@@ -75,20 +75,22 @@ export class SendSaleInvoiceMailCommon {
       tenantId,
       invoiceId
     );
-    const parsedOptions = await this.contactMailNotification.parseMailOptions(
-      tenantId,
-      mailOptions,
-      formatterArgs
-    );
+    const formattedOptions =
+      await this.contactMailNotification.formatMailOptions(
+        tenantId,
+        mailOptions,
+        formatterArgs
+      );
     const message = await this.getInvoicePaymentMail.getMailTemplate(
       tenantId,
       invoiceId,
       {
         // # Invoice message
-        invoiceMessage: parsedOptions.message,
+        invoiceMessage: formattedOptions.message,
+        preview: formattedOptions.message,
       }
     );
-    return { ...parsedOptions, message };
+    return { ...formattedOptions, message };
   }
 
   /**
@@ -111,13 +113,13 @@ export class SendSaleInvoiceMailCommon {
     );
     return {
       ...commonArgs,
-      ['Customer Name']: invoice.customer.displayName,
-      ['Invoice Number']: invoice.invoiceNo,
-      ['Invoice DueAmount']: invoice.dueAmountFormatted,
-      ['Invoice DueDate']: invoice.dueDateFormatted,
-      ['Invoice Date']: invoice.invoiceDateFormatted,
-      ['Invoice Amount']: invoice.totalFormatted,
-      ['Overdue Days']: invoice.overdueDays,
+      'Customer Name': invoice.customer.displayName,
+      'Invoice Number': invoice.invoiceNo,
+      'Invoice DueAmount': invoice.dueAmountFormatted,
+      'Invoice DueDate': invoice.dueDateFormatted,
+      'Invoice Date': invoice.invoiceDateFormatted,
+      'Invoice Amount': invoice.totalFormatted,
+      'Overdue Days': invoice.overdueDays,
     };
   };
 }
diff --git a/packages/server/src/services/Sales/Invoices/SendSaleInvoiceMail.ts b/packages/server/src/services/Sales/Invoices/SendSaleInvoiceMail.ts
index f95f68fb3..cee271fcd 100644
--- a/packages/server/src/services/Sales/Invoices/SendSaleInvoiceMail.ts
+++ b/packages/server/src/services/Sales/Invoices/SendSaleInvoiceMail.ts
@@ -3,10 +3,7 @@ import Mail from '@/lib/Mail';
 import { ISaleInvoiceMailSend, SendInvoiceMailDTO } from '@/interfaces';
 import { SaleInvoicePdf } from './SaleInvoicePdf';
 import { SendSaleInvoiceMailCommon } from './SendInvoiceInvoiceMailCommon';
-import {
-  parseMailOptions,
-  validateRequiredMailOptions,
-} from '@/services/MailNotification/utils';
+import { mergeAndValidateMailOptions } from '@/services/MailNotification/utils';
 import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
 import events from '@/subscribers/events';
 
@@ -18,12 +15,12 @@ export class SendSaleInvoiceMail {
   @Inject()
   private invoiceMail: SendSaleInvoiceMailCommon;
 
-  @Inject('agenda')
-  private agenda: any;
-
   @Inject()
   private eventPublisher: EventPublisher;
 
+  @Inject('agenda')
+  private agenda: any;
+
   /**
    * Sends the invoice mail of the given sale invoice.
    * @param {number} tenantId
@@ -67,13 +64,10 @@ export class SendSaleInvoiceMail {
       saleInvoiceId
     );
     // Merges message options with default options and parses the options values.
-    const parsedMessageOptions = parseMailOptions(
+    const parsedMessageOptions = mergeAndValidateMailOptions(
       defaultMessageOptions,
       messageOptions
     );
-    // Validates the required mail options.
-    validateRequiredMailOptions(parsedMessageOptions);
-
     const formattedMessageOptions =
       await this.invoiceMail.formatInvoiceMailOptions(
         tenantId,
diff --git a/packages/server/src/services/Sales/PaymentReceived/PaymentReceivedMailNotification.ts b/packages/server/src/services/Sales/PaymentReceived/PaymentReceivedMailNotification.ts
index 5429b4441..49276f8c1 100644
--- a/packages/server/src/services/Sales/PaymentReceived/PaymentReceivedMailNotification.ts
+++ b/packages/server/src/services/Sales/PaymentReceived/PaymentReceivedMailNotification.ts
@@ -13,9 +13,10 @@ import {
 } from './constants';
 import { GetPaymentReceived } from './GetPaymentReceived';
 import { ContactMailNotification } from '@/services/MailNotification/ContactMailNotification';
-import { parseAndValidateMailOptions } from '@/services/MailNotification/utils';
+import { mergeAndValidateMailOptions } from '@/services/MailNotification/utils';
 import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
 import events from '@/subscribers/events';
+import { transformPaymentReceivedToMailDataArgs } from './utils';
 
 @Service()
 export class SendPaymentReceiveMailNotification {
@@ -77,15 +78,19 @@ export class SendPaymentReceiveMailNotification {
       .findById(paymentId)
       .throwIfNotFound();
 
-    const formatterData = await this.textFormatter(tenantId, paymentId);
+    const formatArgs = await this.textFormatter(tenantId, paymentId);
 
-    return this.contactMailNotification.getMailOptions(
-      tenantId,
-      paymentReceive.customerId,
-      DEFAULT_PAYMENT_MAIL_SUBJECT,
-      DEFAULT_PAYMENT_MAIL_CONTENT,
-      formatterData
-    );
+    const mailOptions =
+      await this.contactMailNotification.getDefaultMailOptions(
+        tenantId,
+        paymentReceive.customerId
+      );
+    return {
+      ...mailOptions,
+      subject: DEFAULT_PAYMENT_MAIL_SUBJECT,
+      message: DEFAULT_PAYMENT_MAIL_CONTENT,
+      ...formatArgs,
+    };
   };
 
   /**
@@ -103,12 +108,7 @@ export class SendPaymentReceiveMailNotification {
       tenantId,
       invoiceId
     );
-    return {
-      CustomerName: payment.customer.displayName,
-      PaymentNumber: payment.payment_receive_no,
-      PaymentDate: payment.formattedPaymentDate,
-      PaymentAmount: payment.formattedAmount,
-    };
+    return transformPaymentReceivedToMailDataArgs(payment);
   };
 
   /**
@@ -128,14 +128,31 @@ export class SendPaymentReceiveMailNotification {
       paymentReceiveId
     );
     // Parsed message opts with default options.
-    const parsedMessageOpts = parseAndValidateMailOptions(
+    const parsedMessageOpts = mergeAndValidateMailOptions(
       defaultMessageOpts,
       messageDTO
     );
-    await new Mail()
+    const mail = new Mail()
       .setSubject(parsedMessageOpts.subject)
       .setTo(parsedMessageOpts.to)
-      .setContent(parsedMessageOpts.body)
-      .send();
+      .setContent(parsedMessageOpts.message);
+
+    const eventPayload = {
+      tenantId,
+      paymentReceiveId,
+      messageOptions: parsedMessageOpts,
+    };
+    // Triggers `onPaymentReceiveMailSend` event.
+    await this.eventPublisher.emitAsync(
+      events.paymentReceive.onMailSend,
+      eventPayload
+    );
+    await mail.send();
+
+    // Triggers `onPaymentReceiveMailSent` event.
+    await this.eventPublisher.emitAsync(
+      events.paymentReceive.onMailSent,
+      eventPayload
+    );
   }
 }
diff --git a/packages/server/src/services/Sales/PaymentReceived/utils.ts b/packages/server/src/services/Sales/PaymentReceived/utils.ts
index bfd1ad8ea..533783b77 100644
--- a/packages/server/src/services/Sales/PaymentReceived/utils.ts
+++ b/packages/server/src/services/Sales/PaymentReceived/utils.ts
@@ -21,3 +21,12 @@ export const transformPaymentReceivedToPdfTemplate = (
     customerAddress: contactAddressTextFormat(payment.customer),
   };
 };
+
+export const transformPaymentReceivedToMailDataArgs = (payment: any) => {
+  return {
+    'Customer Name': payment.customer.displayName,
+    'Payment Number': payment.paymentReceiveNo,
+    'Payment Date': payment.formattedPaymentDate,
+    'Payment Amount': payment.formattedAmount,
+  };
+};
diff --git a/packages/server/src/services/Sales/Receipts/SaleReceiptMailNotification.ts b/packages/server/src/services/Sales/Receipts/SaleReceiptMailNotification.ts
index 24add40cc..7683c6c81 100644
--- a/packages/server/src/services/Sales/Receipts/SaleReceiptMailNotification.ts
+++ b/packages/server/src/services/Sales/Receipts/SaleReceiptMailNotification.ts
@@ -13,9 +13,10 @@ import {
   SaleReceiptMailOptsDTO,
 } from '@/interfaces';
 import { ContactMailNotification } from '@/services/MailNotification/ContactMailNotification';
-import { parseAndValidateMailOptions } from '@/services/MailNotification/utils';
+import { mergeAndValidateMailOptions } from '@/services/MailNotification/utils';
 import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
 import events from '@/subscribers/events';
+import { transformReceiptToMailDataArgs } from './utils';
 
 @Service()
 export class SaleReceiptMailNotification {
@@ -79,18 +80,19 @@ export class SaleReceiptMailNotification {
       .findById(saleReceiptId)
       .throwIfNotFound();
 
-    const formattedData = await this.textFormatter(tenantId, saleReceiptId);
+    const formatArgs = await this.textFormatterArgs(tenantId, saleReceiptId);
 
-    const mailOpts = await this.contactMailNotification.getMailOptions(
-      tenantId,
-      saleReceipt.customerId,
-      DEFAULT_RECEIPT_MAIL_SUBJECT,
-      DEFAULT_RECEIPT_MAIL_CONTENT,
-      formattedData
-    );
+    const mailOptions =
+      await this.contactMailNotification.getDefaultMailOptions(
+        tenantId,
+        saleReceipt.customerId
+      );
     return {
-      ...mailOpts,
+      ...mailOptions,
+      message: DEFAULT_RECEIPT_MAIL_CONTENT,
+      subject: DEFAULT_RECEIPT_MAIL_SUBJECT,
       attachReceipt: true,
+      formatArgs,
     };
   }
 
@@ -101,7 +103,7 @@ export class SaleReceiptMailNotification {
    * @param {string} text - The given text.
    * @returns {Promise<string>}
    */
-  public textFormatter = async (
+  public textFormatterArgs = async (
     tenantId: number,
     receiptId: number
   ): Promise<Record<string, string>> => {
@@ -109,19 +111,14 @@ export class SaleReceiptMailNotification {
       tenantId,
       receiptId
     );
-    return {
-      CustomerName: receipt.customer.displayName,
-      ReceiptNumber: receipt.receiptNumber,
-      ReceiptDate: receipt.formattedReceiptDate,
-      ReceiptAmount: receipt.formattedAmount,
-    };
+    return transformReceiptToMailDataArgs(receipt);
   };
 
   /**
    * Triggers the mail notification of the given sale receipt.
    * @param {number} tenantId - Tenant id.
    * @param {number} saleReceiptId - Sale receipt id.
-   * @param {SaleReceiptMailOpts} messageDTO - Overrided message options.
+   * @param {SaleReceiptMailOpts} messageDTO - message options.
    * @returns {Promise<void>}
    */
   public async sendMail(
@@ -129,30 +126,45 @@ export class SaleReceiptMailNotification {
     saleReceiptId: number,
     messageOpts: SaleReceiptMailOptsDTO
   ) {
-    const defaultMessageOpts = await this.getMailOptions(
+    const defaultMessageOptions = await this.getMailOptions(
       tenantId,
       saleReceiptId
     );
     // Merges message opts with default options.
-    const parsedMessageOpts = parseAndValidateMailOptions(
-      defaultMessageOpts,
+    const parsedMessageOpts = mergeAndValidateMailOptions(
+      defaultMessageOptions,
       messageOpts
-    );
+    ) as SaleReceiptMailOpts;
+
     const mail = new Mail()
       .setSubject(parsedMessageOpts.subject)
       .setTo(parsedMessageOpts.to)
-      .setContent(parsedMessageOpts.body);
+      .setContent(parsedMessageOpts.message);
 
+    // Attaches the receipt pdf document.
     if (parsedMessageOpts.attachReceipt) {
       // Retrieves document buffer of the receipt pdf document.
-      const receiptPdfBuffer = await this.receiptPdfService.saleReceiptPdf(
-        tenantId,
-        saleReceiptId
-      );
+      const [receiptPdfBuffer, filename] =
+        await this.receiptPdfService.saleReceiptPdf(tenantId, saleReceiptId);
+
       mail.setAttachments([
-        { filename: 'receipt.pdf', content: receiptPdfBuffer },
+        { filename: `${filename}.pdf`, content: receiptPdfBuffer },
       ]);
     }
+    const eventPayload = {
+      tenantId,
+      saleReceiptId,
+      messageOptions: {},
+    };
+    await this.eventPublisher.emitAsync(
+      events.saleReceipt.onMailSend,
+      eventPayload
+    );
     await mail.send();
+
+    await this.eventPublisher.emitAsync(
+      events.saleReceipt.onMailSent,
+      eventPayload
+    );
   }
 }
diff --git a/packages/server/src/services/Sales/Receipts/SaleReceiptsPdfService.ts b/packages/server/src/services/Sales/Receipts/SaleReceiptsPdfService.ts
index 3ea9f7566..9c9c6132b 100644
--- a/packages/server/src/services/Sales/Receipts/SaleReceiptsPdfService.ts
+++ b/packages/server/src/services/Sales/Receipts/SaleReceiptsPdfService.ts
@@ -35,7 +35,10 @@ export class SaleReceiptsPdf {
    * @param {number} saleInvoiceId -
    * @returns {Promise<Buffer>}
    */
-  public async saleReceiptPdf(tenantId: number, saleReceiptId: number) {
+  public async saleReceiptPdf(
+    tenantId: number,
+    saleReceiptId: number
+  ): Promise<[Buffer, string]> {
     const filename = await this.getSaleReceiptFilename(tenantId, saleReceiptId);
 
     const brandingAttributes = await this.getReceiptBrandingAttributes(
diff --git a/packages/server/src/services/Sales/Receipts/constants.ts b/packages/server/src/services/Sales/Receipts/constants.ts
index 547d91a56..b1a1c3898 100644
--- a/packages/server/src/services/Sales/Receipts/constants.ts
+++ b/packages/server/src/services/Sales/Receipts/constants.ts
@@ -1,16 +1,16 @@
 export const DEFAULT_RECEIPT_MAIL_SUBJECT =
-  'Receipt {ReceiptNumber} from {CompanyName}';
+  'Receipt {Receipt Number} from {Company Name}';
 export const DEFAULT_RECEIPT_MAIL_CONTENT = `
-<p>Dear {CustomerName}</p>
+<p>Dear {Customer Name}</p>
 <p>Thank you for your business, You can view or print your receipt from attachements.</p>
 <p>
-Receipt <strong>#{ReceiptNumber}</strong><br />
-Amount  : <strong>{ReceiptAmount}</strong></br />
+Receipt <strong>#{Receipt Number}</strong><br />
+Amount  : <strong>{Receipt Amount}</strong></br />
 </p>
 
 <p>
 <i>Regards</i><br />
-<i>{CompanyName}</i>
+<i>{Company Name}</i>
 </p>
 `;
 
diff --git a/packages/server/src/services/Sales/Receipts/utils.ts b/packages/server/src/services/Sales/Receipts/utils.ts
index 933de982a..b075aa637 100644
--- a/packages/server/src/services/Sales/Receipts/utils.ts
+++ b/packages/server/src/services/Sales/Receipts/utils.ts
@@ -1,9 +1,12 @@
-import { ISaleReceipt, ISaleReceiptBrandingTemplateAttributes } from "@/interfaces";
-import { contactAddressTextFormat } from "@/utils/address-text-format";
+import {
+  ISaleReceipt,
+  ISaleReceiptBrandingTemplateAttributes,
+} from '@/interfaces';
+import { contactAddressTextFormat } from '@/utils/address-text-format';
 
-
-
-export const transformReceiptToBrandingTemplateAttributes = (saleReceipt: ISaleReceipt): Partial<ISaleReceiptBrandingTemplateAttributes> => {
+export const transformReceiptToBrandingTemplateAttributes = (
+  saleReceipt: ISaleReceipt
+): Partial<ISaleReceiptBrandingTemplateAttributes> => {
   return {
     total: saleReceipt.formattedAmount,
     subtotal: saleReceipt.formattedSubtotal,
@@ -18,4 +21,13 @@ export const transformReceiptToBrandingTemplateAttributes = (saleReceipt: ISaleR
     receiptDate: saleReceipt.formattedReceiptDate,
     customerAddress: contactAddressTextFormat(saleReceipt.customer),
   };
-}
\ No newline at end of file
+};
+
+export const transformReceiptToMailDataArgs = (saleReceipt: any) => {
+  return {
+    'Customer Name': saleReceipt.customer.displayName,
+    'Receipt Number': saleReceipt.receiptNumber,
+    'Receipt Date': saleReceipt.formattedReceiptDate,
+    'Receipt Amount': saleReceipt.formattedAmount,
+  };
+};
diff --git a/packages/server/src/subscribers/events.ts b/packages/server/src/subscribers/events.ts
index d735dd1a9..cd1044500 100644
--- a/packages/server/src/subscribers/events.ts
+++ b/packages/server/src/subscribers/events.ts
@@ -213,7 +213,7 @@ export default {
 
     onPreMailSend: 'onSaleEstimatePreMailSend',
     onMailSend: 'onSaleEstimateMailSend',
-    onMailSent: 'onSaleEstimateMailSend',
+    onMailSent: 'onSaleEstimateMailSent',
   },
 
   /**