1. Wrong password or missing app-specific password
Apple, Yahoo, AOL, and some Microsoft accounts require app-specific passwords.
Regular login passwords will not work in those cases.
2. IMAP access is disabled
Some providers (like Outlook.com accounts) allow IMAP to be turned off.
If IMAP is disabled, Marco cannot sync your mail.
3. OAuth failed due to account permissions
For Google/Microsoft accounts:
Ensure you're logged into the correct account while authorizing
Your admin may restrict IMAP/OAuth access for work/school accounts
4. Provider rate-limits
If you use multiple email clients simultaneously, your provider may temporarily block IMAP access—we explain it here. Marco will retry automatically.
If none of the above solves it, reach us at [email protected] and we’ll take a look.