[gentoo-user] Re: Setting up fetchmail to feed postfix

[Ian Zimmerman <itz@very.loosely.org>]

On 2017-11-26 16:46, Rich Freeman wrote:

> You'll find this recipe all over the place, but with procmail you can
> do this:
> https://mymegabyte.com/2010/03/filter-duplicate-emails-with-procmail/

I don't trust procmail anymore after CVE-2017-16844.  It took me a long
time, I had a weak spot for it, you might say, despite its horrible
looking source.  But now it's over.  I have rewritten my delivery
framework using Perl and Mail::Audit, and I feel very relieved.

> I highly recommend using it.  Works on lists/direct/etc.  You won't
> find yourself complaining about crossposts, being on CC, or whatever
> again.

On the other list I mentioned, I am getting dupes after a _month_.
It would take a huge .msgid file to detect that, and remember formail
does a linear search through it.

I'm experimenting with using the filesystem as a hashtable, creating an
empty file based on each Message-ID header (of course I munge it to get
a valid filename).

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