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SMTP 500 5.5.0 Syntax error - line too long

Posted on 2012-03-27
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Last Modified: 2013-02-28
Hi,

I am using outlook 2003 to send email to several parties but one of parties return the captioned error. I had tried using outlook 2010 to send the same mail to the same receipient and it worked. Please tell me anything I can do with outlook 2003 to solve this problem.
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Question by:bigwong
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Renbod earned 2000 total points
ID: 37775817
Hi,

The SMTP Error 550 response can be caused by quite a few situations. Usually it is at the recipient’s end.

The best thing to do is to work out which server generated the bounce, to do this open the returned email and click file, info, properties and have a look at the internet headers (or paste them on here).

Once you know which server created the bounce you can check it's smtp logs to see why.
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