Re: [exim] Submission mode complications.

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Szerző: Magnus Holmgren
Dátum:  
Címzett: exim-users
Tárgy: Re: [exim] Submission mode complications.
On Sunday 16 July 2006 19:09, W B Hacker took the opportunity to write:
> Robert M. Zigweid wrote:
> > On Jul 16, 2006, at 12:24 AM, W B Hacker wrote:
> >>Robert Zigweid wrote:
> >>>Jul 15 20:58:33 fc563134 exim[12339]: 2006-07-15 20:58:33 SMTP
> >>>connection
> >>>from [67.168.2.24]:55664 I=[216.75.63.134]:587 (TCP/IP connection
> >>>count = 1)
> >>>Jul 15 20:58:38 fc563134 exim[12358]: 2006-07-15 20:58:38 ident
> >>>connection
> >>>to 67.168.2.24 timed out
> >>>Jul 15 20:58:38 fc563134 exim[12358]: 2006-07-15 20:58:38 remote host
> >>>address is the local host: xilisha.zigweid.net (while verifying <
> >>>rzigweid@???> from host ([192.168.1.100])
> >>>[67.168.2.24
> >>>]:55664)
> >>
> >>But "host 216.75.63.134" indicates that your hostname should
> >>be "fc563134.aspadmin.net",
> >>And a 'dig any fc563134.aspadmin.net' returns only a SOA record, no
> >>A, PTR, or
> >>MX records.


But that's not what's causing the error. "remote host address is the local
host" means that the dnslookup router was given a domain that, according to
MX and A records, the local host should handle. If the Exim installation this
log excerpt comes from is supposed to handle mail for xilisha.zigweid.net
then xilisha.zigweid.net should be added to local_domains (or whatever means
is used to tell Exim which domains are local) (since xilisha.zigweid.net is
the primary_hostname it can be abbreviated "@").

> > The other thing that I find very confusing, is this behavior is only
> > apparently exhibited in submission mode from my MUA. If I try to
> > send a message from the machine that exim is on, I do not see this
> > behavior and the mail is successfully sent and received by the
> > intended target.


Possibly there is no sender verification performed for mail from localhost.

> Only IF that target is not running strict rDNS / forward/reverse host
> lookup rules.
>
> You may be more strict than the far-end, and logs would show rejection of
> incoming conections, if you have any so far.


I don't think most MTAs reject mail from hosts where the domain returned
through reverse lookup doesn't resolve back to the original IP, but, like
Exim, they may log a warning.

-- 
Magnus Holmgren        holmgren@???
                       (No Cc of list mail needed, thanks)