Question

Exchange 2007 Out of office replies are rejected due to blank sender

Asked by: RossEdwards

I have a number of clients who we have upgraded to Exchange 2007, since doing this, we have found that out-of-office auto replies from their Exch server to external recipients are generated, but not accepted by their SMTP smarthost because the message appears to come from a blank sender address.

Here is a sample of Ex 2007 SMTP send log:

2008-07-02T22:08:38.937Z,Forward to smarthost,08CAAAA74D6CDA79,11,10.0.0.2:30262,87.127.246.178:25,>,MAIL FROM:<> SIZE=2826 BODY=7BIT,
...
2008-07-02T22:08:38.968Z,Forward to smarthost,08CAAAA74D6CDA79,13,10.0.0.2:30262,87.127.246.178:25,<,250 2.1.0 Ok,
2008-07-02T22:08:38.968Z,Forward to smarthost,08CAAAA74D6CDA79,14,10.0.0.2:30262,87.127.246.178:25,<,554 5.7.1 <>: Sender address rejected: Access denied,
2008-07-02T22:08:38.968Z,Forward to smarthost,08CAAAA74D6CDA79,15,10.0.0.2:30262,87.127.246.178:25,>,QUIT,

If the server is configured to deliver directly via DNS, it works, unless the recipient's mail server has a policy that blocks blank senders.

Am I missing a trick here or is Exchange just being difficult.  I have found 2 other posts on this site with the same problem and no responses, so I am hoping someone might have come across this.

Many thanks!

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Asked On
2008-07-02 at 15:14:42ID23535320
Tags

Exchange

,

2007

Topics

Exchange Email Server

,

Simple Mail Transfer Protocol (SMTP)

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Answers

 

by: KidegoPosted on 2008-07-03 at 16:58:45ID: 21930214

Is the smarthost an Exchange 2007 box, or just an SMTP box? Is the smarthost configured to allow all mail from the IP of the Exchange 2007 box?

 

by: RossEdwardsPosted on 2008-07-04 at 01:26:51ID: 21931679

Smarthost is the ISP, probably QMail of somthing like this.  The IP and domains of the sending server are authorised.

 

by: KidegoPosted on 2008-07-04 at 04:41:34ID: 21932447

Then you're going to have to ask them if they can stop filtering the mail you're trying to send, and I'm betting they won't do that for you. If the smarthost was your server, then when you authorized your Exchange server, it wouldn't filter your outbound messages at all.

 

by: BibliophagePosted on 2008-07-07 at 10:16:33ID: 21946827

Apparently Microsoft has decided to obey an RFC, for once, despite the fact that it's blatantly obvious to anyone who isn't a moron that most blank senders are spammers.  

http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=3370071&SiteID=17

Message Display Notification is NULL, deliberately.

Additional information on configuring OOF  -

http://msexchangeteam.com/archive/2006/10/06/429115.aspx

You aren't likely to get your ISP to allow null senders, since it is a common anti-spam technique.  Microsoft will probably have to patch it at some point.

 

by: RossEdwardsPosted on 2008-07-21 at 11:45:30ID: 31473045

Yes I found this article too - couldn't quite believe it though.

20120131-EE-VQP-002

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