Troubleshooting Email Delivery Issues

If your server is not sending or receiving email, it can be due to a number of reasons.

Check if Your Mail Server is Running

If you run your own mail server (e.g., Postfix), check its status:

sudo systemctl status postfix

Check Your Server's IP on Blacklists

If your server's IP address has been blacklisted for sending spam, other mail servers will reject your email. Use a tool like the MXToolbox Blacklist Check.

Check DNS Records (SPF, DKIM, DMARC)

Proper DNS records are essential for email deliverability. You must have correctly configured MX, SPF, DKIM, and DMARC records for your domain to be trusted by providers like Gmail and Outlook.

Check Mail Logs

Your mail server's logs (e.g., `/var/log/mail.log`) will contain the exact error messages for why an email failed to send or be received.