Re: postfix [was Re: Sendmail vs Exim vs Others]
Nano Nano wrote:
My first test message to the outside world bounced with:
<firstname.lastname@example.org>: host smtp.comcast.net[184.108.40.206] said:
[PERMFAIL] comcast.net requires valid sender (in reply to RCPT TO
exim always added my "Sender" header for me.
I presume comcast is rejecting your email because it doesn't like the
hostname given in the HELO/EHLO command. It saying 'comcast.net requires
valid sender' sounds like it. What do 'postconf myorigin' and 'postconf
myhostname' say? You (or rather comcast) want myorigin to be a hostname
that's in the Internet DNS.