Re: [exim] No route to host - but msg sent successfully

sam wun wrote:
> I don't know why I got error "No route to host" when sending email to
> the exim-users mailing list this morning, but the msg is sent
> successfully as I can see it listed in the public now. I only get this
> message after installed exim4.4 yesterday and leave it for overnight.
> The error is;
> 2004-10-21 08:10:51 1CKQXX-00066D-L4 sesame.csx.cam.ac.uk
> [2001:630:200:8080:20e:cff:fe09:a58a]: No route to host

The exim.org mailserver (sesame.csx.cam.ac.uk) has an IPv6 address (the
one above) and an IPv4 address - the familiar dotted quad IP.

Your server doesn't have an IPv6 IP / IPv6 transit anywhere, so you
can't send mail to sesame.csx over IPv6. Once your exim finds that out
it retries sending mail over IPv4 and that gets through.