[Pkg-exim4-users] acl: RCPT; logs: garbage (questions)

Marc Haber mh+pkg-exim4-users at zugschlus.de
Mon Jul 9 12:20:48 UTC 2007

On Sun, Jul 08, 2007 at 09:32:08AM +0000, Oleg Verych wrote:
> First question, is there any hidden sense in accepting any local mail
> without checking local part? It seems to me non, thus asking.
> I.e.
> | -*- conf -*
> acl_check_rcpt:
>   # Accept if the source is local SMTP (i.e. not over TCP/IP). We do this by
>   # testing for an empty sending host field.
>   accept
>     hosts = :
> ...

That is taken verbatim from upstream's example configuration. I
suspect that they want to ensure that locally generated undeliverable
mail (which might originate from a program which might not be prepared
to queue mail or process error message) generates a bounce to catch
the operator's attention.

For the same reason, our configuration accepts mail from authenticated
senders before doing recipient verification, as many "user-friendly"
MUAs do not show the SMTP error message to the user.

I am more astonisched that we actually do sender verification even for
authenticated senders; I'd have expected these to be accepted and
bounced as well.

> Instead of doing first
> | -*-
> acl_check_rcpt:
>   require
>       verify = recipient
> ...
> | -*-

I do not think that this makes sense for the default configuration. It
might make sense for some local configurations, but the local admin is
invited to adapt the configuration to her needs.

> Second. Is there easy way of getting rid of garbage like this?
> | -*- garbage -*-
> 2007-07-06 17:16:26 SMTP protocol synchronization error (next input sent too so
> on: pipelining was advertised): rejected "</p>" H=(mx5.biz.mail.yahoo.com) [85.
> 108.174.88] next input="  <p align=3D"left">We offer a free gift box with every
>  VIP wat<span style=\r\n=3D"FONT-SIZE: 2px; FLOAT: right; COLOR: white"> unl </
> span>ch ordered. Y"

Not that I am aware of.


Marc Haber         | "I don't trust Computers. They | Mailadresse im Header
Mannheim, Germany  |  lose things."    Winona Ryder | Fon: *49 621 72739834
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