troubleshooting Question

Customer is getting errors e-mailing our domain and it seems to bypass spam filter

Avatar of Slagwag
SlagwagFlag for United States of America asked on
ExchangeAntiSpam
10 Comments1 Solution2590 ViewsLast Modified:
We have an Exchange 2010 environment utilizing Postini for incoming e-mail. Our mail server is configured to only allow incoming e-mail from Postini so it has to get filtered rather then hitting our server directly. However one customer sending us e-mail cannot get through and gets the following e-mail back:

From: MAILER-DAEMON@messagelabs.com [mailto:MAILER-DAEMON@messagelabs.com]
Sent: Friday, February 03, 2012 12:16 PM
To: Customer Name
Subject: failure notice

This is the mail delivery agent at messagelabs.com.
I was not able to deliver your message to the following addresses.

<ouruser@company.com>:
Connected to 11.51.11.111 but sender was rejected.
Remote host said: 530 5.7.1 Client was not authenticated

Is messagelabs spam filtering somehow sending to us directly?
ASKER CERTIFIED SOLUTION
bluebook

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 10 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 10 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