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docker_notes:docker-mailserver [2025-06-22 Sun wk25 15:19] – [dovecot] baumkpdocker_notes:docker-mailserver [2025-08-16 Sat wk33 19:39] (current) – [exim] baumkp
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   *[[https://easyengine.io/tutorials/mail/swaks-smtp-test-tool/|swaks – SMTP test tool]]   *[[https://easyengine.io/tutorials/mail/swaks-smtp-test-tool/|swaks – SMTP test tool]]
   *[[https://commandmasters.com/commands/swaks-linux/|How to Use the Command 'swaks' (with Examples)]]   *[[https://commandmasters.com/commands/swaks-linux/|How to Use the Command 'swaks' (with Examples)]]
 +
 +=====exim=====
 +After updating my VM from Debian 12 to 13 the mailserver container refused to start as it indicated that port 25 was already in use.  
 +
 +It would seem that Debian 13 automatically installed and starts Exim, some kind of system email client.
 +
 +The solution was simply to stop and disable Exim from running, ''sudo 'systemctl stop/disable exim4''
 +
 +The method to find the program using the port was the command ''sudo lsof -i :25''
 +
 + 
 =====References===== =====References=====
   *Workaround.org [[https://workaround.org/ispmail/bullseye/|ISPmail guide for Debian 11 “Bullseye”]]   *Workaround.org [[https://workaround.org/ispmail/bullseye/|ISPmail guide for Debian 11 “Bullseye”]]