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I opened source code of my email found an attribute called : X-Message-Delivery. What does it mean? Is it important? Can I add this attribute to my php mailer, is it modifiable?

John Smith
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Guns_Roses
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1 Answers1

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You can add any headers you like with PHPMailer. Whether they do or mean anything is an entirely separate matter. Anything starting with X- is used to denote a non-standard, and usually informational, header (defined in RFC822).

Take a look at this question to see what that particular header means - it's informational and added by hotmail.

Community
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Synchro
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