assistance understanding an error message


assistance understanding an error message
\ Joey (12 Jul 2007)
. \ Noel Jones (12 Jul 2007)

1 msg	Backscatter Testing
4 msg	Problem with Postfix
9 msg	Backscatter mail
6 msg	[Fwd: pflogsumm]
1 msg	pflogsumm
3 msg	Re: problem with rejected client
2 msg	A question about SpamAssassin+Postfix
2 msg	Reject unknown recipient - Active Directory
11 msg	real-user transport under postfix...
8 msg	autoresponder for postfix ?
3 msg	Mail System Redesign
2 msg	RAID type suggestion
12 msg	Maildir Vs MBox
8 msg	passwd -> MySQL?
4 msg	Transport question
5 msg	Reverse DNS on virtual host machine
2 msg	Postfix and Ldap (Forward and Redirect)
1 msg	yet another ldap setup
1 msg	Rejecing messages but deliver them anyway

Subject:	assistance understanding an error message
Group:	Postfix-users
From:	Joey
Date:	12 Jul 2007

Hello,

I just want to make sure I understand what happened here, and what RULE
created the bounce.

The error shows:

Jul 12 16:33:12 pluto postfix/smtpd[9659]: NOQUEUE: reject: RCPT from
mail1a.Thebank.com[66.16.166.167]: 554 5.7.1 <MTL01PPSMTP01.THEBANK.COM>:
Helo command rejected: Host not found; from=<Matthew>
to=<Mario> proto=ESMTP helo=<MTL01PPSMTP01.THEBANK.COM>

The reason for the bounce was that MTL01PPSMTP01.THEBANK.COM does not have a
DNS entry ( name has been changed so it won't resolve for you here ).

And I think that reject_unknown_helo_hostname was the rule?

Or was it reject_invalid_helo_hostname?

Also if they simply had thebank.com that would have allowed it to work
right?

Thinking this is an exchange box.

Thanks!

Joey