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In some E-mail messages from Exchange 2003 Server (w/SP2) we are seeing "{CR}{LF}{TAB}" embedded in E-mail addresses within the "To:" and/or "CC:" fields.

In some E-mail messages from Exchange 2003 Server (w/SP2) we are seeing "{CR}{LF}{TAB}" embedded in E-mail addresses within the "To:" and/or "CC:" fields.  For example,

To: joe@domain.com; fred@domain.com; john@domain.com

is actually transmitted as

      <joe@domain.com>,<fred@domain.com>,<joh{CR}{LF}{TAB}n@domain.com>

Based on reading of the RFC 822 standard, the {CR}{LF}{TAB} is considered to be linear-white-space(LWS) used in folding.  However, our testing shows that Yahoo mail, Hotmail and Sendmail are not interpreting the E-mail addresses correctly.  I see:

            joh n@domain.com
            joh.n@domain.com

My question, is whether or not Microsoft is interpreting the standard correctly in its placement of LWS.

If not, is there a way to force Exchange 2003 to change the way in which it inserts LWS?
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dmarshx
Asked:
dmarshx
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1 Solution
 
SembeeCommented:
I have never seen Exchange do that before.

How are those messages generated? By a user sending email in the usual way through Outlook, or by something else that is sending the email by SMTP?

If it is the former, I would be looking at third party interference. Antispam, antivirus or a firewall scanning traffic it shouldn't.
If is the latter then it could be that something is not generating the email in the correct format.

Simon.

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dmarshxAuthor Commented:
This is being sent by Outlook to Exchange. Our users reported some strange e-mail results and It took us about 1/2 a day to duplicate this. We could only duplicate this when we added enough email addresses to cause the email addresses to wrap.  My example was simplified, but what we are observing is that the mail header is getting wrapped and it can be broken inside the actual e-mail address. We had to work with the make-up of the number and length of e-mail addreses to recreate.

Something on the order of
"USER-NAME1" <user1@domain.com>, "USER-NAME2" <user2@domain.com>, "USER-NAME3" <user3@hotmail.com> , "USER-NAME4"<user4@gmail.com>, "USER-NAME5" <user5@hotmail.com>, "USER-NAME6" <user6@domain.com>, "USER_NAME7" <user7@domain.com>,"USER_NAME8" <user7@yahoo.com>,"USER_NAME9" <user9@domain.com>

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SembeeCommented:
Thing is, the headers are built by Exchange, not by Outlook. Therefore all of that information is processed later on. I am still not convinced it is Exchange that is doing it. I have sent messages that wrap on multiple lines and never seen this error.

Simon.

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Computer101Commented:
Forced accept.

Computer101
EE Admin
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