Mail.com Login and Sending Problems
Quick answer: Confirm you're using the exact domain you chose at signup, enable IMAP/POP under Settings before connecting a third-party app, and check for an oversized attachment if sending is stuck.
1. Can't sign in on the website
- Confirm you're using your full address, including the domain you picked at signup — Mail.com offers dozens of options, and mixing them up is a genuinely common mistake.
- Use "Forgot password" rather than guessing repeatedly, which can trigger a temporary lock.
- Clear cookies for mail.com, or try a private window if the login page itself seems stuck.
2. Third-party app (Outlook, Thunderbird, phone Mail app) won't connect
Mail.com needs IMAP/POP3 access explicitly enabled before any third-party app can connect — it's off by default on new accounts, which catches people out constantly.
- Sign in on the Mail.com website.
- Settings → POP3/IMAP → enable the protocol your app uses. IMAP's the better choice if you check mail from more than one device.
- Re-add the account in your app afterward — anything entered before you enabled this will keep failing even if it's otherwise correct.
3. Outgoing mail stuck or rejected
- Confirm outgoing settings match Mail.com's current documentation — server address and port shift occasionally, so don't trust old saved settings from years back.
- Check for an oversized attachment stuck in the outbox.
4. Account flagged or restricted
Free webmail providers sometimes apply sending limits on new or low-activity accounts as an anti-spam measure. If sending suddenly stops with no clear error, waiting a few hours before trying again is usually the fix, not a broken setting.
Managing several Mail.com domain aliases? Double-check which exact address you're troubleshooting — settings are sometimes per-alias, not account-wide.
Missing incoming mail specifically? See our guide on Mail.com not receiving emails.