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Not receiving email from sender with special character

Posted on 2008-06-16
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Last Modified: 2012-06-21
We are having issues with receiving a particular email from an individual with an email address that utilizes special characters.  The email is of the format:

firstname.O'neil@domainname.com

We have been able to send messages to this address, however we are unable to receive any from the address.  I believe the email comes through our current spam filter, because the email does make it to our MessageTracking logs, however it lists the email as such:

'firstname.O' 'neil@domainname.com'

Is there a setting in exchange that handles special characters that we are missing or is this a different problem?
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Question by:nmonroe
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coolsport00 earned 500 total points
ID: 21796395
Well, it seems domain accts can have the (') character in the username according to: http://technet2.microsoft.com/windowsserver/en/library/232d2aab-b33b-4bf7-9c8c-bb659bf6a35b1033.mspx?mfr=true

So, the question is, does Exchange accept email addresses with special characters? Since Exchange uses accounts from Active Directory, mailboxes having usernames with (') should work. There is one thing I found though...Alias names cannot use special characters (see: http://technet.microsoft.com/en-us/library/aa997663(EXCHG.80).aspx). But, that wouldn't have anything to do with you receiving the email.

Can you perform a query on your spam filter to see if it was actually delivered or placed in quarantine? Obviously, if it was quarantined, then the spam filter is having trouble accepting the email and you would need to contact the spam filter vendor for assistance.

~coolsport00
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by:nmonroe
ID: 21797536
I have queried the spam filter and have not found the email address in the quarantine.  It would appear that the server is receiving the emails, because our MessageTracking logs pick up the particular emails however it is not clear where the email ends up after that.
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Author Comment

by:nmonroe
ID: 21865788
The problem was with my firewall.  The External spam filter (securence.com) would have identified the email as blocked, and would have identified it in the daily spam digest email.  My firewall, a Watchguard Firebox has a SMTP Proxy.  I opened it up all the way and the email address was no longer blocked.

Thanks again for your response.  You helped factor out the Exchange server.

-nick
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