Setup · 4 min read
Connect a Gmail or Google Workspace mailbox
Create an app password and add a Gmail or Workspace mailbox to Mailnitrix in about five minutes.
· Mailnitrix team
Mailnitrix connects to Gmail and Google Workspace mailboxes with an app password: a separate 16-character password that only works for the app you create it for, and that you can revoke at any time.
Before you start
- You need to be able to sign in to the Google account you're connecting.
- 2-Step Verification must be on. Google only offers app passwords on accounts that use it.
- On Google Workspace, your administrator must allow app passwords and IMAP. If you don't see the app passwords page, ask them.
Step 1: Turn on 2-Step Verification
- Go to myaccount.google.com/security.
- Under How you sign in to Google, open 2-Step Verification and follow the steps.
Step 2: Create an app password
- Go to myaccount.google.com/apppasswords.
- Enter a name you'll recognise, such as Mailnitrix, and select Create.
- Copy the 16-character password Google shows you. You won't see it again. The spaces don't matter.
Step 3: Add the mailbox in Mailnitrix
- In Mailnitrix, open Senders and add a new sender account.
- Enter the mailbox's email address and, optionally, the display name recipients should see.
- Paste the app password. The Gmail server settings are filled in for you:
| Setting | Value |
|---|---|
| SMTP host | smtp.gmail.com |
| SMTP port | 587 |
| IMAP host (for warmup) | imap.gmail.com |
| IMAP port | 993 |
- Set a daily limit. For a brand-new mailbox, keep it low and let warmup raise campaign volume gradually. For an established mailbox, 30 to 40 is a sensible ceiling for cold email.
- Save, then run the connection test.
If the test fails
| Error | What to do |
|---|---|
535 5.7.8 Username and Password not accepted | You used your normal password, mistyped the app password, or it was revoked. Create a new app password. |
534 5.7.9 Application-specific password required | 2-Step Verification is on, so Google needs an app password instead of your normal one. |
| The app passwords page says the setting isn't available | 2-Step Verification is off, or your Workspace admin has disabled app passwords. |
Next steps
- Set up warmup so the mailbox builds reputation before your first campaign.
- Make sure your domain has SPF, DKIM and DMARC records. In Google Workspace, DKIM is switched on in the admin console under Apps, Google Workspace, Gmail, Authenticate email.
- Read Gmail sending limits to understand how much each mailbox should send.