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Re: lists.debian.org has received bounces from you

On Thu, Sep 08, 2011 at 11:56:25AM CEST, Brad Rogers <brad@fineby.me.uk> said:
> On Wed, 7 Sep 2011 21:19:15 +0000 (UTC)
> Walter Hurry <walterhurry@lavabit.com> wrote:
> Hello Walter,
> > I don't really see how whitelisting could help - if OP's email
> It may well not, but it can't hurt.
> > provider thinks it's spam, would they not put it into a junk folder or
> > some such rather than bounce it?
> One would hope so, but I often get bounce messages from places that I
> (supposedly) sent spam to.  Obviously, it was sent with a faked From:
> address.  Also with a non-existent recipient address, even though the
> domain is valid.  Many places seem to check the To: first and send a
> bounce, rather than test for spaminess first, and silently drop stuff.
> IDK which system is best, since each has its advantages.
> There's no telling which category any given email provider falls into,
> unless you do your own.

The best way to avioid this (called backscatter) is that the
receiving side rejects the mail and does not bounce it.

http://www.postfix.org/BACKSCATTER_README.html explains what is
backscatter (and how to configure postfix to avoid it).

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