Question

Email does not get delivered

Asked by: sonic1394

The sender is emailing our company, however the emails do not get delivered properly.
Most other emails go through flawlessly. So I'm pretty sure the exchange server is setup properly. It usually always works properly. However this specific sender's emails do not go through.
There are no error messages, no bounceback messages.

I inquired with our spamservice provider. They analyzed the log for our exchange server and extracted this:
(Why is the email not being delivered, when the log shows it is? How can I correct this problem?)

The message was received and queued during the 250 look up from the back end. MX Logic queued the message for a few seconds and then delivered the message. The message was queued because of a white list entry for one of the Recipients xxx@canlogistics.com. Below is the log info.

[2009-03-25-10:23:08/3215510416/52244.00-021] [I] (Accept) Accepted INBOUND Job from (208.57.73.196)
[2009-03-25-10:23:08/3467266960/52244.00-021] [I] (MAIL) From:[2009-03-25-10:23:08/3530206096/52244.00-021] [I] (RCPT) RCPTTO: [2009-03-25-10:23:08/3530206096/52244.00-021] [I] (RCPT) RCPTTO: [2009-03-25-10:23:08/3530206096/52244.00-021] [I] (RCPT) Rcpt has different mode, MESSAGE (normal) RCPT (user_whitelist)
[2009-03-25-10:23:08/3530206096/52244.00-021] [I] (RCPT) F[046]<- 250 xxx@canlogistics.com ok (INBOUND) Queue
[2009-03-25-10:23:08/3572165520/52244.00-021] [I] (DATA) F[044]<- 354 Start mail input
[2009-03-25-10:23:09/3467266960/52244.00-021] [I] (Worker) Resetting FrontEnd DATA response to: 250 Message Queued (Rcpt Policies): 2 RCPTS
After the short QUeue to identify the WHite list entry themessage was delivered.
[2009-03-25-10:23:12/3631209360] [L] new/c6a5ac94.3121101712.52244.00-021.p01c11m075.mxlogic.net-1 [c6a5ac94.3121101712.52244.00-021.p01c11m075.mxlogic.net-1] Successful delivery (from:xxx@trans-union.com) (to:xxx@canlogistics.com) [/mxl/var/sockets/mta_inbound]: 250 Backend Replied

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Asked On
2009-03-27 at 12:14:10ID24272328
Tags

mx logic

,

exchange server

Topics

Server Applications

,

Exchange Email Server

,

Simple Mail Transfer Protocol (SMTP)

Participating Experts
2
Points
500
Comments
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Answers

 

by: florin_sPosted on 2009-03-27 at 13:40:20ID: 24005270

Hi,

it seems that the domain trans-union.com in blacklisted  so your spam filter is blocking mails from this domain, you can check here:

http://www.mxtoolbox.com/

 

by: sonic1394Posted on 2009-03-27 at 17:56:50ID: 24006661

I just spoke to the spamfilter folks and they say that the message was delivered to my server.

I can't verify that it was because that log is gone.

 

by: sonic1394Posted on 2009-03-27 at 20:25:15ID: 24007113

I tried running a search in the Exchange message tracking feature... I get this error.

I thought this feature would help me figure out if the messages are actually delivered to my server.

Is it possible for the messages to be delivered to my server, but not the recipient?

 

by: sonic1394Posted on 2009-03-27 at 20:32:38ID: 24007125

btw Fiorin

thanks for the suggestion. The sender's domain is blacklisted on a dns server, but my mxlogic spam service provider is sure that has nothing to do with this mysterious problem.

Their logs show the message is being delivered to my server. If it is being delivered to my server, my server must have a glitch where it doesn't deliver to the recipients. .

 

by: florin_sPosted on 2009-03-28 at 02:33:51ID: 24007759

the domain is still blacklisted, do you have an antivirus running on your exchange server, try and disable it for a while and also check your queue for the missing message

 

by: sonic1394Posted on 2009-03-28 at 23:32:03ID: 24011640

All the messages in queue have been processed. Message isn't there.

An antivirus is running for email. Its the trendnet scanmail prgm. This antivirus program has nothing to do with the problem.

We currently have appriver filtering email for X domain AND
mxlogic filtering email for Y and Z domains.

email from the mentioned sender comes through the X domain, but it does not go through Y and Z domains.

So I have to believe the problem is between mxlogic and my server. Mx logic claims the messages are delivered to my server. If this is the case, how can I verify? and how can I look for them if my message tracking center is giving me that error?

Is there a way to change the standard exchange log to include subjects from the emails? I'm thinking that would help me Identify the email from this sender and confirm that its delivered to my exchange server.

 

by: sonic1394Posted on 2009-03-28 at 23:35:02ID: 24011646

and by the way, this email problem is specific to this sender and his domain. Most email goes through fine to Y and Z, so Mx logic's claim that it's not on their end is possible.

XY and Z domains go to the same exchange server. We're canceling our services with appriver due to a dispute, which is why fixing this problem for Y and Z domains has become so important to me.

 

by: tymesPosted on 2009-03-29 at 12:31:11ID: 24014119

The sending does seem to be "whitelisted".   We need to see the error you get back as that may tell us where the message was rejected and why... you've just shown us the logs of it getting whitelisted and accepted and presumably accepted:

Successful delivery (from:xxx@trans-union.com) (to:xxx@canlogistics.com) [...]: 250 Backend Replied

here you see what your logs said... mxlogic accepted and presumably delivered the message successfully more than that it seems that mxlogic said the "backend" accepted the message and if it works as a proxy delivering stuff until bad stuff is detected then it is the recipient server in your office that accepted the message and later rejected it.

Again,  You need to show us the error message back and what it said so we can find out why it said that.



 

by: sonic1394Posted on 2009-04-04 at 06:22:46ID: 31563668

I followed their advise and have advanced logging enabled. Since then, these incidents have not repeated and mail is going through properly. Thanks tymes and fiorin.

20120131-EE-VQP-002

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