I'm using the current stable release off ISPconfig - great tool!
Today a user reported an issue with the autoresponder.
sends an email to email@example.com
The ispconfig-user has autoresponder activated and represents the local user usr4_test
+ autoresponder enabled
+ POP3/IMAP/SMTP works fine
Instead of successfully delivering the autoresponder-message to firstname.lastname@example.org
, the ispconfig-host is rejected by foreignhost.tld because of its sendername.
Let's see the Diagnostic-Code:
Diagnostic-Code: X-Postfix; host dsxx-xx-xxx-xxx.domain.tld[xx-xx-xxx-xxx]
said: 504 <usr_4test@localhost>: Sender address rejected: need
fully-qualified address (in reply to RCPT TO command)
It's easy to figure out the issue – the recipient's mailserver rejects mails from sender which domains it couldn't resolve.
Postfix acts like this by adding the following lines to main.cf
smtpd_recipient_restrictions = permit_sasl_authenticated,
I think this problem could be solved, if the autoresponder uses an email-alias instead of its local-username.
Is there a patch anywhere? Or does my installation misbehave?
Regards from Germany,