When in logs show messages like: postfix/qmgr[2381]: warning: connect to transport relay: No such file or directory postfix/qmgr[2381]: warning: connect to transport relay: No such file or directory trinity last message repeated 2 times you have emails unsent and should be deleted to clean postfix and avoid those annoying messages. To do that, You can check inside /var/spool/postfix/defer and find the ID's of deferred messages (inside defer folder a simple find will work). This folder contains Read more...