?
Solved

Mail bounces with #5.1.2 reply when sending from Outlook 2007, but not from OWA, sending to specific addreses, not all?

Posted on 2010-11-15
4
Medium Priority
?
1,575 Views
Last Modified: 2013-11-30
Hi, I have a user that gets bounces when he sends mail to a few (far from all) recipients from his Outlook 2007 client, but not from Outlook Web Access, connected to the same Exchange server 2003 (SBS). If the recipient is in his contacts the bounce doesnt give any information more than "unable to deliver". If the user deletes the recipient from contacts,  the bounce reply with the <mail.xx.com #5.1.2>.
We have set up his user on another computer and the same thing happens.
Anyone got an idea what the problem is with the Outlook client?
0
Comment
Question by:Mistlur
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
4 Comments
 
LVL 6

Expert Comment

by:ob1_
ID: 34136579
I would re-create the Outlook profile on the user's PC just to be sure and make sure you are typing the address in correctly and not selecting it from contacts or using Outlook auto-fill to fill it in.

SMTP Error 512 :
This SMTP reply code is received
when one of the servers on the way to the destination is
unable to resolve the domain name of a recipient email
address. Said differently : one of the servers on the way
to the destination, including your server or your ISP, has a
DNS problem or, possibly correctly, does not like one of
the email addresses in the message’s TO, CC, and BCC
fields.
The first check you should perform to resolve a 5.1.2 reply
code is to check all the recipient email addresses for
incorrect domain names (misspelt domain names, or,
maybe, totally non-existent domain names) – remember,
error code 512 is very specifically an error with the
domain name of one of the recipient email addresses.
You can call the recipient(s) or use the WHOIS tool of The
Ultimate Troubleshooter. If all the recipient email
addresses check out as regards the domain part of the
email addresses, then one of the servers on the way to the
recipient(s) has DNS problems – usually this will be one of
the first 2 servers in the chain, your own mail server (or
your network) or your ISP’s mail server.
Examples of typical SMTP error 512 messages : “5.1.2 -
Bad destination host 'DNS Hard Error looking up domain”,
or “SMTP Error 550 5.1.2 Host unknown – host cannot be
found”, or how about this fantastically informative error
message “5.1.2 The message could not be delivered
because the recipient's destination email system is
unknown or invalid. Please check the address and try
again, or contact your system administrator to verify
connectivity to the email system of the recipient.”.
--------------
In summary : most SMTP error 512 conditions are
caused by misspellings of the domain name part of a
recipient email address. However, with the proliferation
of spam, error 512 is also often encountered by automatic
“out-of-office” replies to junk mail because the domain
names used by junk mail are often bogus domain names.
0
 

Author Comment

by:Mistlur
ID: 34136721
Hi, as I mentioned we have already set up his Outlook profile on another computer, with the same result, so re-creating the profile on his computer (which we also have done), will not solve the problem.
0
 

Accepted Solution

by:
Mistlur earned 0 total points
ID: 34309827
I tested to delete every item in one contact that was bouncing and sent yet another bounce, but when I came to the last item (or the first), the mailaddress, deleted it, saved the contact and typed it in again, the mail was sent without any problem...:-)
So something mysterious was lying in the mailaddress!
0
 

Author Closing Comment

by:Mistlur
ID: 34341534
-I worked my way to the solution myself.
0

Featured Post

Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you an Exchange administrator employed with an organization? And, have you encountered a corrupt Exchange database due to which you are not able to open its EDB file. This article will explain all the steps to repair corrupt Exchange database.
Here in this article, you will get a step by step guidance on how to restore an Exchange database to a recovery database. Get a brief on Recovery Database and how it can be used to restore Exchange database in this section!
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…
how to add IIS SMTP to handle application/Scanner relays into office 365.
Suggested Courses

649 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question