Continuing the discussion from Email to custom address fails: "lost connection after EHLO":
A probe of my mail-receiver begins:
telnet forum.tasat.org 25
Trying 64.176.213.39...
Connected to forum.tasat.org.
Escape character is '^]'.
220 forum.tasat.org ESMTP Postfix
EHLO example.org
250-forum-mail-receiver.localdomain
(...etc...)
Though I seem to be receiving mail ok, I was advised elsewhere that the 250-forum-mail-receiver.localdomain bit is problematic:
That MTA greets with a domain that is neither reserved nor assigned. That makes it look like it is blissfully unaware that it is accepting SMTP connections from the internet, where local nicknames or unqualified names MUST NOT be used. (You should fix that regardless of what the 220 greeting said, as information received before TLS was established is discarded.)
I can’t figure out where a value forum-mail-receiver.localdomain is stored or constructed.
app.yml includes:
DISCOURSE_SMTP_DOMAIN: forum.tasat.org
mail-receiver.yml includes:
MAIL_DOMAIN: forum.tasat.org
POSTCONF_smtpd_banner: forum.tasat.org ESMTP $mail_name
What else should I be doing with this…?