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Old 10th July 2006, 21:49
Yves Yves is offline
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Default Autoresponder / Local Username / Reject / Bounce

Hi,

I'm using the current stable release off ISPconfig - great tool!
Today a user reported an issue with the autoresponder.

User mail@foreignhost.tld sends an email to ispconfig-user@ispconfighost.tld.

mail@foreignhost.tld => ispconfig-user@ispconfighost.tld

The ispconfig-user has autoresponder activated and represents the local user usr4_test

ispconfig-user@ispconfighost.tld
+ usr4_test
+ autoresponder enabled
+ POP3/IMAP/SMTP works fine


Instead of successfully delivering the autoresponder-message to mail@foreignhost.tld, the ispconfig-host is rejected by foreignhost.tld because of its sendername.

Let's see the Diagnostic-Code:

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

Code:
smtpd_recipient_restrictions = permit_sasl_authenticated,
    permit_mynetworks,
    reject_invalid_hostname,
    reject_non_fqdn_hostname,
    reject_non_fqdn_sender,
    reject_non_fqdn_recipient,
    reject_unknown_sender_domain,
    reject_unknown_recipient_domain,
    reject_unauth_pipelining,
    reject_unauth_destination,
So…

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,

Yves
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