?
Solved

Action: failed Status: 5.5.0

Posted on 2014-04-03
3
Medium Priority
?
1,036 Views
Last Modified: 2014-04-27
Microsoft Exchange Server 2003 SP2 - 6.5.7638

Last week when we tried to email anyone from a certain domain with a small attachment it wouldn't send. We could email them without attachments, but not with. People from other domains could email them with the same attachment though. At the time our domain was on & off being blacklisted due to a Zeus bot virus. Today we can email them with an attachment.

The error we got back from our Exchange server was:

Final-Recipient: RFC822; name@receivers-domain.net
Action: failed Status: 5.5.0
X-Supplementary-Info: <our-server.our-domain.com #5.5.0 smtp;550 Requested action not taken: mailbox unavailable>
X-Display-Name: name@receivers-domain.net

Open in new window


Googling this error has not proved fruitful for me. Although it seems likely it was due to being black listed, it doesn't explain why we could email them without attachments at the time.

Anyone got any ideas? I'm paranoid this will reoccur and I want to be ahead of the game if it does.
0
Comment
Question by:fred2k3
[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 Comments
 
LVL 63

Accepted Solution

by:
Simon Butler (Sembee) earned 2000 total points
ID: 39977564
While it is your server generating the NDR, the problem has come from the other side. Ultimately they were blocking your traffic and whatever tool they are using doesn't return any useful information.

Not a lot you can do about it unfortunately, as the remote server isn't under your control.
You can take measures to limit the impact of a future infection, such as giving Exchange its own dedicated IP address, dropping the use of Exchange 2003 (which is end of life later this month), consider using a third party filtering service so your email doesn't come from your IP address etc.

Simon.
0
 

Author Comment

by:fred2k3
ID: 39985668
Ok thank you for the advice.
0

Featured Post

Prepare for your VMware VCP6-DCV exam.

Josh Coen and Jason Langer have prepared the latest edition of VCP study guide. Both authors have been working in the IT field for more than a decade, and both hold VMware certifications. This 163-page guide covers all 10 of the exam blueprint sections.

Question has a verified solution.

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

A list of top three free exchange EDB viewers that helps the user to extract a mailbox from an unmounted .edb file and get a clear preview of all emails & other items with just a single click on mailboxes.
There are times when we need to generate a report on the inbox rules, where users have set up forwarding externally in their mailbox. In this article, I will be sharing a script I wrote to generate the report in CSV format.
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…
Suggested Courses

762 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