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Question:

How to set a Custom Message-ID header for Emails?

Dec 23 '14 at 10:20

How can i remove my computername from Message-ID when sending email?

If i understand right, the Message-ID needs to be unique. But can i change the text part something else then my computername?

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Answer

See the MailMan.AutoGenMessageId property. You can turn that off by setting it to false, and then you can explicitly set the Message-ID header via the Email.AddHeaderField method (which replaces a header field if it already exists).