feat: Add optional SMTP_NAME configuration for connecting to SMTP servers that require the client to have a specific hostname

server/emails/mailer.tsx

@@ -1,4 +1,5 @@
 import nodemailer, { Transporter } from "nodemailer";
+import SMTPTransport from "nodemailer/lib/smtp-transport";
 import Oy from "oy-vey";
 import env from "@server/env";
 import Logger from "@server/logging/Logger";
@@ -101,8 +102,9 @@ export class Mailer {
     }
   };
 
-  private getOptions() {
+  private getOptions(): SMTPTransport.Options {
     return {
+      name: env.SMTP_NAME,
       host: env.SMTP_HOST,
       port: env.SMTP_PORT,
       secure: env.SMTP_SECURE ?? env.ENVIRONMENT === "production",
@@ -124,7 +126,9 @@ export class Mailer {
     };
   }
 
-  private async getTestTransportOptions() {
+  private async getTestTransportOptions(): Promise<
+    SMTPTransport.Options | undefined
+  > {
     try {
       const testAccount = await nodemailer.createTestAccount();
       return {

server/env.ts

@@ -264,6 +264,12 @@ export class Environment {
    */
   public SMTP_HOST = process.env.SMTP_HOST;
 
+  /**
+   * Optional hostname of the client, used for identifying to the server
+   * defaults to hostname of the machine.
+   */
+  public SMTP_NAME = process.env.SMTP_NAME;
+
   /**
    * The port of your SMTP server.
    */