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Problem in Sending emails(undeliverable emails)

sohailsoh
in Web Development (HTML, Java, PHP, ASP, XML, etc.)

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Dear All,

I have developed an application with sending an email alert to users.

But i am having problem that email is returned back from some users with the following message

undeliverable to test@test.test

Body of message generated response:

500 5.5.0 Syntax error - line too long

Original message follows.

Please advise on this issue.

Thank you,

Regards

give us all of the code that you are using for sending out the emails.

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