Add Gmail SMTP option + docs

backend/src/services/smtp.ts

@@ -3,7 +3,8 @@ import {
   SMTP_HOST_SENDGRID, 
   SMTP_HOST_MAILGUN,
   SMTP_HOST_SOCKETLABS,
-  SMTP_HOST_ZOHOMAIL
+  SMTP_HOST_ZOHOMAIL,
+  SMTP_HOST_GMAIL
 } from '../variables';
 import SMTPConnection from 'nodemailer/lib/smtp-connection';
 import * as Sentry from '@sentry/node';
@@ -46,6 +47,12 @@ export const initSmtp = async () => {
         }
         break;
       case SMTP_HOST_ZOHOMAIL:
+        mailOpts.requireTLS = true; 
+        mailOpts.tls = {
+          ciphers: 'TLSv1.2'
+        }
+        break;
+      case SMTP_HOST_GMAIL:
         mailOpts.requireTLS = true; 
         mailOpts.tls = {
           ciphers: 'TLSv1.2'

backend/src/variables/index.ts

@@ -55,7 +55,8 @@ import {
   SMTP_HOST_SENDGRID, 
   SMTP_HOST_MAILGUN,
   SMTP_HOST_SOCKETLABS,
-  SMTP_HOST_ZOHOMAIL
+  SMTP_HOST_ZOHOMAIL,
+  SMTP_HOST_GMAIL
 } from './smtp';
 import { PLAN_STARTER, PLAN_PRO } from './stripe';
 import {
@@ -138,6 +139,7 @@ export {
   SMTP_HOST_MAILGUN,
   SMTP_HOST_SOCKETLABS,
   SMTP_HOST_ZOHOMAIL,
+  SMTP_HOST_GMAIL,
   PLAN_STARTER,
   PLAN_PRO,
   MFA_METHOD_EMAIL,

backend/src/variables/smtp.ts

@@ -2,10 +2,12 @@ const SMTP_HOST_SENDGRID = 'smtp.sendgrid.net';
 const SMTP_HOST_MAILGUN = 'smtp.mailgun.org';
 const SMTP_HOST_SOCKETLABS = 'smtp.socketlabs.com';
 const SMTP_HOST_ZOHOMAIL = 'smtp.zoho.com';
+const SMTP_HOST_GMAIL = 'smtp.gmail.com';
 
 export {
     SMTP_HOST_SENDGRID,
     SMTP_HOST_MAILGUN,
     SMTP_HOST_SOCKETLABS,
-    SMTP_HOST_ZOHOMAIL
+    SMTP_HOST_ZOHOMAIL,
+    SMTP_HOST_GMAIL
 }

docs/self-hosting/configuration/email.mdx

@@ -23,7 +23,7 @@ By default, you need to configure the following SMTP [environment variables](htt
 - `SMTP_FROM_ADDRESS`: Email address to be used for sending emails (e.g. team@infisical.com).
 - `SMTP_FROM_NAME`: Name label to be used in `From` field (e.g. Team).
 
-Below you will find details on how to configure common email providers (not in any particular order).
+Below you will find details on how to configure common email providers:
 
 <AccordionGroup>
 <Accordion title="Twilio SendGrid">
@@ -135,6 +135,34 @@ SMTP_FROM_NAME=Infisical
 </Info>
 </Accordion>
 
+<Accordion title="Gmail">
+
+Create an account and enable "less secure app access" in Gmail Account Settings > Security. This will allow
+applications like Infisical to authenticate with Gmail via your username and password.
+
+![Gmail secure app access](../../images/email-gmail-app-access.png)
+
+With your Gmail username and password, you can set your SMTP environment variables:
+
+```
+SMTP_HOST=smtp.gmail.com
+SMTP_USERNAME=hey@gmail.com # your email
+SMTP_PASSWORD=password # your password
+SMTP_PORT=587
+SMTP_SECURE=true
+SMTP_FROM_ADDRESS=hey@gmail.com
+SMTP_FROM_NAME=Infisical
+```
+
+<Warning>
+  As per the [notice](https://support.google.com/accounts/answer/6010255?hl=en) by Google, you should note that using Gmail credentials for SMTP configuration
+  will only work for Google Workspace or Google Cloud Identity customers as of May 30, 2022.
+
+  Put differently, the SMTP configuration is only possible with business (not personal) Gmail credentials.
+</Warning>
+
+</Accordion>
+
 <Accordion title="Zoho Mail">
 
 1. Create an account and configure [Zoho Mail](https://www.zoho.com/mail/) to send emails.