Question

mail: cannot send message: Process exited with a non-zero status

I was setting up Postfix with this tutorial https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-postfix-as-a-send-only-smtp-server-on-ubuntu-20-04

Upon sending test email got this error message “mail: cannot send message: Process exited with a non-zero status”


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Bobby Iliev
Site Moderator
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April 27, 2022

Hello,

In addition to what has already been mentioned, you might also have to define your hostname in /etc/hostname and make sure that the hostname for 127.0.0.1 in /etc/hosts matches that too.

Best,

Bobby

KFSys
Site Moderator
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April 27, 2022

Hi @aecsp2000,

I’ll recommend checking the error log to see the exact reason as to why you are receiving this message. The error log should be located in the ```/var/log/` folder somewhere. The file is usually called /var/log/maillog, /var/log/mail.err or /var/log/mail.

Additionally, you can try to reconfigure Postfix with the following command

sudo dpkg-reconfigure postfix

Just let me know which options are you selecting.