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I'm trying to configure Webmin to send email "Via SMTP to remote mail server" - however, I keep getting this error:
.. sending failed : SMTP command mail from: <REDACTED> failed : 550 Access denied - Invalid HELO name (See RFC2821 220.127.116.11) , line 6.
Apparently, the HELO command isn't working, but how do I change it so that webmin uses a different HELO command? Thanks!
I'm guessing now that it's sending the hostname as the helo, but since my hostname is not a FQDN, the remote server isn't accepting it. Any way to resolve this without changing my hostname to a FQDN?
Unfortunately, Webmin currently only uses the full hostname (as reported by the hostname -f command) in the HELO SMTP command.
However, in the next release of Webmin I will make it possible to configure the name used in HELO (at Servers -> Read Mail -> Module Config)