beta.blog

I received an error message saying

Sorry, your helo has been denied. 550

when attempting to send an email from my mutt server (which is using postfix to send emails) to a .gmx.net address. The cause of error was an incomplete postfix configuration.

I managed to fix this error by editing the file /etc/postfix/main.cfg
After opening it, I edited/added the following two lines:

myhostname = www.betamaster.us
mydomain = www.betamaster.us

Attempting to send an email to a .gmx.net address the next time completed successfully.