SMTP Error (550)
Posted: Fri Mar 25, 2022 1:35 am
I realize this has been posted before but I can't find the fix
I have a fully functional subscription paid direct admin server on my network, it works fine, I'm trying to mimic the settings for Vesta, I have an external dns server and as far as I can tell everything is the same from the web portal set up, the only thing not working is sending mail, I immediately keep getting this error.
SMTP Error (550): Failed to set sender "USER" (Access denied - Invalid HELO name (See RFC2821 4.1.3)).
I have full access to the files of both servers, please guide me to the root of the problem
I have a fully functional subscription paid direct admin server on my network, it works fine, I'm trying to mimic the settings for Vesta, I have an external dns server and as far as I can tell everything is the same from the web portal set up, the only thing not working is sending mail, I immediately keep getting this error.
SMTP Error (550): Failed to set sender "USER" (Access denied - Invalid HELO name (See RFC2821 4.1.3)).
I have full access to the files of both servers, please guide me to the root of the problem