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A little off the MI topic, no? <G>

Anyway, "X-Mailer:" described the mailer software used to send the message.
Very little is mandatory in the SMTP message header and I'm not aware of
_any_ "X-" headers that are mandatory. The idea of the "X-" prefix is that
this is a non-standard extension. Of course some "X-" extensions have become
defacto standards, but none of them are mandatory.

If you're sending mail using your own software you're free to make X-Mailer
appropriate for you. We use it in one of our products to indicate that the
message came from the product and what version. "X-" headers are great for
storing all sorts of things about the message, think of them as the SMTP
version of the META tag in HTML if that helps.


Walden H Leverich III
Tech Software
(516) 627-3800 x11
(208) 692-3308 eFax

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)

-----Original Message-----
From: Gene_Gaunt@xxxxxxxxxxxxxxx [mailto:Gene_Gaunt@xxxxxxxxxxxxxxx] 
Sent: Monday, April 14, 2003 1:31 PM
To: MI400@xxxxxxxxxxxx
Subject: [MI400] X-Mailer in MIME

What does "X-Mailer:" stand for in a MIME header?  Is it mandatory?

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