Re: was Re: socket trace, now SMTP protocol (OT)

["Larry Loen" <lwloen@xxxxxxxxxx>]

>I would add that all polite mail senders include the 'From' and 'To'
>headers, as most mail clients use these to display who the message was
sent
>by and who the message is to.

It's more serious than politeness.  You may need it as a fundamental
requirement.

If you are at all concerned about getting past anti-SPAM filters, even in
your own organization, then a more full-blown and robust mail header
usually helps. SPAMmers often put out pretty minimalist mail and the lack
of things (especially From and To) are just the sort of things that
automated SPAM filters discard without a second thought.  Meanwhile, if
there is a good "From" or "To" field, many anti-SPAM filters will
explicitly include your mail in as "acceptable".

The whole world of SPAM filtering is very ad hoc, but that's a start of how
to think about it.  You'd be amazed at how much SPAM doesn't even bother to
put in a "To" you field.  And, of course, they're seldom smart enough to
pose as being part of your company, so the "From" field will at least
segregate in-house and external mail very readily.




Larry W. Loen  -   Senior Java and AS/400 Performance Analyst
                          Dept HP4, Rochester MN


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