Fetchmail/Sendmail rejects

[Malcolm Kay]

On Sunday 15 August 2004 04:34, you wrote:
> Malcolm Kay wrote:
> > I run fetchmail in daemon mode to download
> > POP3 mail from my ISP.
> >
> > Sendmail rejects many messages as for example:
> > Aug 14 16:59:33 beta sm-mta[35000]: i7E7DYje035000:
> >   ruleset=check_mail, arg1=<fbbjqwvcydimv at lightspeedcredit.com>,
> >   relay=localhost.home [127.0.0.1], reject=451
> >   4.1.8 Domain of sender address fbbjqwvcydimv at lightspeedcredit.com
> >   does not resolve
> >
> > I am quite happy to have these rejected but it seems they don't
> > get deleted at the ISP end and clog up the mail box, I think
> > eventually confusing fetchmail.
> >
> > Is there some reasonable way of disposing of these messages. I would
> > prefer not to download these into my normal user mailbox but I would
> > be quite happy to divert them to some pseudo user setup for the
> > purpose. I would imagine sendmail can be coaxed into doing this, but
> > how?
> >
> > Responding to 2 or 3 lists using a valid e-mail address means that
> > I receive a lot of spam including much with unresolvable addresses.

>
> have a look at mail/filtermail
>

I've just downloaded this port and find it quite interesting. However it
seems not to offer very much in this particular case as the criteria used 
are similar to those used by my ISP to reject mail -- I'm able to set the 
level. But I don't see a way of getting filtermail to reject based on 
domain name resolution.

Others have pointed out that spam filtering in fetchmail can be used to 
delete mail based on the error code returned by sendmail. It seems it 
might also be reasonable to change sendmail.cf to issue a 553 error in place
of the 451 as the 553 invoking messages are deleted by fetchmail by default.

Thanks for the thought and bringing an interesting port to my attention.

Malcolm