On Mon, 9 Nov 1998, Robert Zilbauer wrote:
> On two separate occasions now, I've found that Exim (2.05) will reject a
> connection from a machine if that machine doesn't have a reverse DNS entry.
> Unfortunately, the connection is rejected with no fanfare and nothing about
> the event is written to the logs.
What (relevant) configuration options have you set? Exim does not do a
reverse DNS lookup unless it has to. This can be because you have
specified that it should do so in host_lookup_nets, or because there is
some configuration option that requires Exim to know the correct name of
the remote host, e.g. sender_host_reject specified by a wild-carded host
name.
Oh, and it will also automatically do a reverse DNS lookup if the remote
host issues
HELO your.host.name
If Exim fails to find a host name when it needs it, it will normally
take a hard line and reject the call. However, see the description of
'+allow_unknown' in section 7.15 about host lists.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--
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http://www.exim.org/ ***
