Home » Kerio User Forums » Kerio Connect » Connect 7.3.0 - Message-ID header missing

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I have a client running 7.3.0, they are having some of their messages rejected with the error "550-RFC2822 says that all mail SHOULD have a Message-ID header. 550 Most messages without it are spam, so your mail has been rejected.)

Does anyone know why Connect would not be adding the message header when sending out?


Neil Whiteside (Kerio)

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Hi Graham,

You're right - by default all messages from "Users" should/will have a header.

Are the affected messages auto-generated, such as non-delivery reports and Out of Office replies?

I would recommend upgrading to at least v7.4.3, or preferably v8.1.3.

If no joy, I would recommend that you open a support ticket, as we would want to see the config files, error logs and debug logs.

Best regards,


[Updated on: Tue, 24 September 2013 11:53]

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