James M Galvin <[EMAIL PROTECTED]> wrote:
>... Without out-of-band information is not possible to construct
>*a* filter criterion that will correctly filter all elist messages.
Filtering is pass�. It's unreliable, fragile, and expensive. The right
way to channel messages from lists is PLSA[1] (Per-List Subscription
Addresses). PLSA is to filtering as VERP is to bounce message parsing.
My MTA[2] makes it easy for me to create multiple addresses for myself
and to process messages sent to those addresses however I choose;
reliably, and with no filtering overhead or guesswork.
For example, I'm subscribed to list-managers as
[EMAIL PROTECTED] To file list-managers mail in the
correct folder, all I had to do was create the file
~/.qmail-list-managers containing the delivery instruction:
./Mail/spool/list-managers
I've been using PLSA for several years now, and it's been
wonderful.
And qmail's extension addresses are *great* for tracking and
controlling e-mail addresses entered into web forms. For example, if I
register on www.foobar.com, I use the address
[EMAIL PROTECTED] If Foobar ever gives out that address, I
can tell immediately, by looking at the header of a spam, where they
got my address, and I can easily revoke the ds-foobar address.
-Dave
Footnotes:
[1] I just made up that acronym.
[2] qmail, of course. See http://Web.InfoAve.Net/~dsill/lwq.html
