From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <728ac7a9dba39b9c1f2fe35b2328feca@swtch.com>
To: marina@surferz.net, 9fans@cse.psu.edu
Subject: Re: [9fans] Still picking at a wierd mail issue under Qemu...
From: "Russ Cox" <rsc@swtch.com>
Date: Wed,  8 Mar 2006 14:04:11 -0500
In-Reply-To: <380-22006338185551616@M2W052.mail2web.com>
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> Yes, there is no mx record for my ISP's outgoing SMTP server.
> Should there be one ? It seems that only domains that are actually
> having mail delivered to them should need an MX record.

The way that /mail/lib/remotemail invokes upas/smtp,
it is giving smtp.cox.east.net as the domain to deliver
the mail to.  If the mx lookup returns zero entries
then it dials the name directly, but if the mx returns
a dns failure, then it waits for dns to unbreak.

You could change /mail/lib/remotemail to say
exec /bin/upas/smtp -g $addr -h $fd $addr $sender $*
(e.g., add the -g $addr option) and that should
dial the given address even when dns is failing.

Otherwise, edit /sys/src/cmd/upas/smtp/mxdial.c
is where to start, as Erik said.

Russ