Troubleshooting IMAP authentication issues

When trying to signup / authenticate / connect an inbox for an IMAP account using the IMAP protocol and it returns an error, follow this troubleshooting guide.

Description

Most of the time the problem relates to:

  • Wrong port number
  • Server does not have a valid SSL/TLS connection.
  • IP block

Resolution

We built our own test which uses our IP's:

Try the IMAP / SMTP connectivity test via
US: https://api-support-automation.nylas.com/tools/connectivity-test
EU: https://ireland-api-support-automation.nylas.com/tools/connectivity-test

Updated

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