Fetchmail/Sendmail problem after installing FC2

Alexander Dalloz alexander.dalloz at uni-bielefeld.de
Mon Jun 14 12:15:18 UTC 2004

Am Mo, den 14.06.2004 schrieb Colin Paul Adams um 11:11:

> After installing (from scratch, apart from /home directory) FC2, I can
> no longer receive mails from a particular address. I used to receive
> mails from him when I had FC1 installed.
> The address concerned has an MX record - I can get a listing with dig
> -t MX, but if I omit the -t MX record, then I get:
> Truncated, retrying in TCP mode.
> and then timed out - not servers could be found.

You name resolution setup is broken. You need to fix it.

> fetchmail/sendmail rejects his emails with:
> maillog.1:Jun  7 23:53:45 colina sendmail[29693]: i57MiHN5029693: ruleset=check_mail, arg1=<neal at 3dsafety.com>,
> relay=localhost.localdomain [], reject=451 4.1.8 Domain of sender address neal at 3dsafety.com does not resolve

The relay is localhost? Ah, because you get the mail via fetchmail.

> So my questions are:
> 1) Is there a fix for this?

Yes, you must setup DNS proper. If using bind then check your bind
configuration. If you do not use any own name server then check the
/etc/hosts file, /etc/resolv.conf and /etc/nsswitch.conf to be proper.

> and if not,
> 2) Can I tell sendmail to always allow this particular address through?

You could use FEATURE(`accept_unresolvable_domains')dnl. But only using
that and not fixing your broken DNS setup would be "unwise"

> Colin Paul Adams


Alexander Dalloz | Enger, Germany | GPG key 1024D/ED695653 1999-07-13
Fedora GNU/Linux Core 2 (Tettnang) on Athlon CPU kernel 2.6.6-1.427 
Serendipity 14:08:43 up 10:43, 9 users, 0.45, 0.76, 0.64 
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