Re: [Exim] MAIL FROM:<>

On Sun, 26 Aug 2001, Greg A. Woods wrote:

> [ On Sunday, August 26, 2001 at 19:39:48 (+0200), Andreas Pettersson wrote: ]
> > Subject: Re: [Exim] MAIL FROM:<>
> >
> > If you don't care, then go ahead and break the RFC and reject the empty
> > enevelope sender.
>
> That's bad advice even if it is meant as sarcasm.
>
> Please don't reject empty sender addresses even if you don't care to
> receive bounces.
>
> More honourable postmasters do care if bounces get delivered and it's
> very very very annoying when we can't return an undeliverable message
> just because the sender's mostmaster has a cavalier attitude about
> e-mail.
>
> We will block your miailer(s) from sending any e-mail to us if you fail
> to allow us to return bounces to them. Whether we do that with
> rfc-ignorant.org or some other mechanism is irrelevant.
>
> (I've often considered implementing a little hack that creates a
> blocking list entry every time a 5xx series error is returned from a
> "MAIL FROM:<>" command! If I'm feeling in a good mood when I think of

Heh.. Exim's smtp callbacks can accomplish this automatically for every
message you receive ;)

> this I plan a TTL on the entry, but usually I just make it permanent and
> require out-of-band intervention to get it removed.)
>
>

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