First checks
- Confirm whether inbound, outbound, webmail, IMAP, POP, or SMTP is affected.
- Check MX records and whether mail is local or remote in cPanel.
- Inspect Exim and Dovecot status if you have WHM or SSH access.
- Look for full mailboxes, full disks, expired SSL, or DNS changes.
- Save bounce messages and full headers before deleting test messages.
Common causes
cPanel email often breaks after DNS migrations, hostname changes, certificate renewals, firewall changes, mailbox quota issues, or mail routing settings that no longer match the domain's MX records.
Need recovery?
Cyber Duct Tape provides cPanel email repair from Lakewood, Colorado for Denver metro and remote clients.