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Exchange email issue

Got a very strange situation in my domain environment. For some reason emails that are destined for a certain recipient are actually being delivered to a different users mailbox and not the intended recipients mailbox.

there are 4 examples and it is not the same sender / recipient every time.  

I have checked the settings in ADUC, EMC and Outlook 2010 for the users that are experiencing this issue and they all seem normal. The same settings of the users that are not experiencing this issue.

Any help would be much appreciated.
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AshGhai
Asked:
AshGhai
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1 Solution
 
James HIT DirectorCommented:
Did you check the EMC for any mailbox forwarding in the user account??
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AmitIT ArchitectCommented:
Are these users from same department?
Are they sending email to any DL?
Any local Contact create by them locally?
Any rule configured in outlook?
Any duplicate SMTP?

I would suggest you to test it from OWA and check the results.
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zboxCommented:
So let's get this straight;

You send email to user A and it gots to user B? OR Are you saying that there is more than one account affected by this problem?

When did this problem begin? Has it ever worked properly?

If it is just the result of emailing user A and it goes to user B, then some type of forwarding may be set up on the users account.

Have them try another computer?

Have you tried emailing user A from a web email account as suggested by amitkulshrestha in the comment above?

If the issue involves mulitple people having the same problem. Is there at least a pattern? Such as emailing to X will go to user Y and emailing to user Y will go to user Z?

Hope these questions help.
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AshGhaiAuthor Commented:
Yes I have checked the EMC and there is no mailbox forwarding in place. Also checked the troubled users Outlooks and there are no rules in place to forward the emails. Also no delegate access has been set up. There are no duplicate SMTP addresses anywhere in the Domain. Only DL with multiple SMTP addresses on. However the emails coming in are addressed to an explicit user not a DL.

This only happens when emails come in from a external SMTP address. To try and make it clearer an outside user, lets say Bob will send a message to user X but it will in fact go to user Y totally bypassing user X.

There seems to be no pattern but there are only 3 SMTP addresses it is happening to. These 3 SMTP addresses are part of a Distribution Group just the email is clearly addressed to user X but is ending up in user Y's mailbox.
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zboxCommented:
Perhaps it has something to do with "autocompletion" ?

Try renaming the users Outlook.NK2 file as suggested as a found solution to a much similar problem at the below link.

http://www.office-outlook.com/outlook-forum/index.php/m/173169/#msg_173169
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zboxCommented:
There is also the feature in Outlook called [message tracking] to help identify what is really going on here.

http://support.microsoft.com/kb/246856
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James HIT DirectorCommented:
use the message tracking in the EMC tools to follow the email flow and see where is was delivered to
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AshGhaiAuthor Commented:
Thank you for your responses. I have used Message Tracking to examine what is going on and all I am shown are internal messages corresponding to correct recipients. The troublesome messages I am referring to in this discussion are not shown.

As this issue is happening when messages are being received from a SMTP address outside of my organisation I am unsure whether the Message Tracking can help me. Please correct me if I am wrong.

Since there is nothing in place to suggest why messages would be delivered wrongly I am inclined to go with zbox's comment with regards to autocompletion. As this is only happening from external SMTP addresses why would there autcompletion cause this to happen?
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zboxCommented:
I have another idea, that is a little more drastic, but it could possibly solve the problem. If this is only occurring with certain email addresses, then would it be ideal to give those (4) users new email addresses. Then just update the Active Directory.

if their email is  joeuser@domainname.com

then change it to joeuser1@domainname.com

- It's kind of a cop-out work-a-round but perhaps it is an option you could explore even long enough to study the differences.

- Sometimes the man-hours is not worth actually figuring out (why) something doesn't work properly and easier to just make it work properly by any means necessary.
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AshGhaiAuthor Commented:
This is yet to be resolved. However it has not happened again since my original examples so as for the solution I am unsure.

Thank you for all of your suggestions. I have tried them all apart from the last one by zbox suggesting changing the users email address. I appreciate your suggestion just I am unable to do this.

I had one idea as to why this might have happened. If sender A messages recipient B put places recipient C in the BCC field then would recipient C receive the email as if it were addressed to them personally?

I am open to any more suggestions you may have and I apologise for the long delay in replying to your suggestions.
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