App passwords are a critical part of how Google mailboxes work in Icemail. This guide explains everything you need to know.
What Are App Passwords?
App passwords are special passwords generated by Google that allow third-party apps (like outreach tools) to connect to a mailbox via SMTP or IMAP — even when 2-factor authentication is enabled.
Icemail generates app passwords automatically when your mailbox becomes active. You do not need to create them manually.
NEVER Change Your Google Mailbox Password Manually
Changing the Google account password manually will immediately invalidate the app password. This will break your SMTP/IMAP connection in any outreach tool connected to that mailbox.
If you need to reset a connection, use the Icemail dashboard to regenerate the app password instead of changing the Google account password.
Where to Find Your App Password
Option 1: Go to Mailboxes in your Icemail dashboard → click on the mailbox → view the app password in mailbox details
Option 2: Export mailboxes as CSV — the app password is included in the CSV export
App Password Is Missing?
If your app password is not showing, it usually means the mailbox is still in processing state. Wait for the mailbox to become active, then the app password will appear automatically.
SMTP & IMAP Settings for Google Mailboxes
SMTP Settings
SMTP Server: smtp.gmail.com
Port: 587 (TLS) or 465 (SSL)
Username: your full email address (e.g. john@yourdomain.com)
Password: your app password (NOT your Google account password)
IMAP Settings
IMAP Server: imap.gmail.com
Port: 993 (SSL)
Username: your full email address
Password: your app password
Troubleshooting SMTP Disconnections
If your outreach tool shows the mailbox as disconnected or SMTP authentication fails:
Try regenerating the app password from the Icemail dashboard
Re-export the mailbox credentials to your outreach tool
If the issue persists, contact team@icemail.ai with your domain name and mailbox email address