Because server settings can vary depending on your provider, this guide outlines the general configuration you’ll need.

IMAP Settings

• IMAP Port: 993

• Encryption: SSL is required

SMTP Settings

Depending on your email provider, SMTP can use different ports. We recommend trying them in the following order:

• Port 465

  • Use SSL

• Port 587

  • Use STARTTLS

• Port 25 (less common)

  • Use STARTTLS

Troubleshooting: X509 Errors

If you see an X509 error, it likely means the domain name you're using doesn't match the mail server's certificate (often due to a self-signed certificate or a mismatch in domain and host names).

To resolve this:

• Enable the "Insecure SSL" option for IMAP, SMTP, or both, depending on which one is causing the error.

Need Help?

If you've tried the configurations above and you're still running into issues, reach out to us at team@polymail.io. We're happy to assist and help get your IMAP account up and running smoothly.