Email Logs

Email Logs Overview

Email logs are stored persistently on the host system. Below are the locations and purposes of various log files, along with some troubleshooting tips.

Mailbox Data Location

• Path: /var/local/enhance/email/mailboxes/{websiteId}/{emailAddress}
  • {websiteId}: The ID of the website.
  • {emailAddress}: Full email address.
• Access Recommendation:
  • Use ssh or su to the website user to avoid permission issues.
  • Modifying these files as root can disrupt user access or backups.

Postfix (MTA) Logs

• Path: /var/log/postfix.log
• Purpose:
  • Tracks incoming and outgoing messages.
  • Useful for diagnosing delivery failures.

Troubleshooting Non-Delivery:

1. Inbound Messages:
   • Ensure external DNS points to the correct mail server.
   • Check the "mail IP" on the website dashboard.
2. Outbound Messages:
   • Verify SPF/DKIM records.
   • Confirm valid PTR records for the server’s IP addresses.
   • Test port 25 connectivity using:

     telnet smtp.gmail.com 25
     

     If a timeout occurs, the provider may be blocking port 25.

Mail Queue Management:

• View Queue: mailq
• Clear Queue: postsuper -d ALL

POP/IMAP (Dovecot) Logs

• View with:

  journalctl -u dovecot
  

• Purpose:
  • Logs POP/IMAP operations.
  • Use when users cannot log in to their email.

Spam Filter (rspamd) Logs

• Config Path: /etc/rspamd
  • Configurations can be modified without affecting Enhance updates.
• Log Path: /var/log/rspamd.log

Sender Rewriting Scheme (SRS)

• Function:
  • Rewrites sender addresses for forwarded emails to pass SPF checks.
  • Managed by srs_milter.