Pop connector picks up mail but does not route to recipients

Posted on 2004-08-20
Last Modified: 2010-05-18
My POP3 connector is picking up mails correctly, but seems to reject the mails at the point of transferring them to the recipient. I have turned on full logging and event log is showing:

Event ID: 4032
The recipient has been processed
NDR Status 502
Error code: 000000000
SMTP Reply: 454.5.7.3 Client was not authenticated

All has been OK until yesterday.  I did make changes to the SMTP default virtual server authentication on basic to enable default domains as our domain, and did this also to the other protocols, but have removed again this morning but still no difference.  I must have done something else to cause the problem but cannot for the life of me think what!!

Any help gratefully accepted.
Question by:zeppelin456
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
  • 4
  • 3

Expert Comment

ID: 11851034
If you are sure you have reversed back all the changes you made yesterday, then restart all Exchange servcies to see if this helps.

Accepted Solution

robinluo earned 250 total points
ID: 11851051
Make sure you leave SMTP access authentication under "anonymous" unless you have specific reason of changing it. The "anonymous" allows other SMTP server to connect to your server and deliver messages. if you turn on authentication to basic, other server will not be able to connect unless they know your password.

Author Comment

ID: 11851183
There is no external server that required authentication - it is just the internal pop connector that is picking up the email and then trying to route them to the internal mail recipients - the authentication seems to be failing at this point.  It is 2000 SBS.
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.


Author Comment

ID: 11851276
Ok - I think that I must have taken anonymous off yesterday thinking that this was a potential security issue, but putting it back on all works fine.  thanks - I feel a bit stupid now!!!

Points awarded - thankyou for the help

Expert Comment

ID: 11851278
1. So now your SMTP does not require authentication, it's under "anonymous", is this correct?
2. Have you restarted SMTP service?

Expert Comment

ID: 11851284
Good to know the problem is solved. Have a good w/end!

Author Comment

ID: 11851286
And you - thanks again

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

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

This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
This article will help to fix the below error for MS Exchange server 2010 I. Out Of office not working II. Certificate error "name on the security certificate is invalid or does not match the name of the site" III. Make Internal URLs and External…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
Suggested Courses

630 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