🚀 go-pugleaf

In article <1990Nov21.084347.25984@Think.COM> barmar@think.com (Barry Margolin) writes:
>In article <3235@exodus.Eng.Sun.COM> argv@turnpike.Eng.Sun.COM (Dan Heller) writes:
>>In article barmar@think.com (Barry Margolin) writes:
>...
>>RFC822 (I think) specifies the Precedence: header that can be set to
>>things like "junk" to indicate that if the mail can't be delivered,
>>drop it on the floor (don't bother sending a mailer daemon).  There
>>are other values that are used to indicate high-volume mailing lists
>>and things, but these are rarely used (in fact, all I've ever seen
>>is "junk" :-).  Admittedly, I should know more about this <gulp>.
>
>I can't find the Precedence field in RFC822.

Look it up in UNIX installation guide for sendmail.  In addition to junk (which
has a numeric value of -100), the precedence can also be set to bulk (-60), 
first-class (0, this is the default), special-delivery (100).

All these work under sendmail.

A side note:  you can also specify a header of "Returned-Receipt-To: ", in
which case the receiving sendmail will generate a receipt automatically to
the e-mail address specified in that field.

Another header which is mostly used in mailing list is called "Errors-To:".
If this is present, any error messages will be delivered to the specified
address in addition to the sender.  Useful (obviously) for maintaining a
mailing list.

					--Pinghua
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