troubleshooting Question

5.0.0 smtp; 550 Administrative prohibition

Avatar of jsarinana
jsarinanaFlag for United States of America asked on
SBSWindows Server 2003
3 Comments1 Solution1627 ViewsLast Modified:
I have a client that sometimes we cannot receive his emails from
it happens when he includes other email Recipients, the email usually just has a link and is addressed to no more than 25 others. I have many other clients that can send us bulk emails over 25 with links and attachments up to 15mbs and it's not a problem
We use Symantics.clould service for spam filtering, I just called thier support and they tell me the rejection is coming from our email server not their filters

the error is:
Diagnostic information for administrators:
 
Generating server: server-17.bemta-7.messagelabs.com
 
user@company.com
mail.company.com #<mail.company.com #5.0.0 smtp; 550 Administrative prohibition> #SMTP#

any suggestions where I can look?
ASKER CERTIFIED SOLUTION
Join our community to see this answer!
Unlock 1 Answer and 3 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 3 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros