Re: [9fans] Still picking at a wierd mail issue under Qemu...

Re: [9fans] Still picking at a wierd mail issue under Qemu...

[marina]

Original Message:
-----------------
From: Russ Cox rsc@swtch.com
Date: Wed, 8 Mar 2006 09:55:31 -0500
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Still picking at a wierd mail issue under Qemu...


> term% cat E*
> smtp: dns: dns failure (net!smtp.east.cox.net)
> term% telnet net!smtp.east.cox.net!25
> connected to net!smtp.east.cox.net!25 on /net/tcp/0
> 220 eastrmmtao06.cox.net ESMTP server (InterMail vM.6.01.05.02 
> 201-2131-123-102-20050715) ready Wed, 8 Mar 2006 02:58:33 -0500

% ndb/dnsquery
> smtp.east.cox.net mx


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.

--- Marina Brown



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Re: [9fans] Still picking at a wierd mail issue under Qemu...

[Russ Cox]

> 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

[9fans] Still picking at a wierd mail issue under Qemu...

[Marina Brown]

Here is the log of the mail failure and of a successfull telnet
to the smtp host.

term% cat E*
smtp: dns: dns failure (net!smtp.east.cox.net)
term% telnet net!smtp.east.cox.net!25
connected to net!smtp.east.cox.net!25 on /net/tcp/0
220 eastrmmtao06.cox.net ESMTP server (InterMail vM.6.01.05.02
201-2131-123-102-20050715) ready Wed, 8 Mar 2006 02:58:33 -0500


Any ideas ?

I read and post news (NNTP) using Acme news, but acme mail still will
not work.

---- Marina Brown

[9fans] Still picking at a wierd mail issue under Qemu...

[erik quanstrom]

yes: upas tries to look up the mx record.
	dnslookup smtp.east.cox.net
fails. there is a problem with their setup.

however, upas/smtp should fall back to the a record.
i wonder why that is not happening.

the function you're interested in is in upas/smtp/mxdial.c

- erik

Marina Brown <marina@surferz.net> writes

|
| Here is the log of the mail failure and of a successfull telnet
| to the smtp host.
|
| term% cat E*
| smtp: dns: dns failure (net!smtp.east.cox.net)
| term% telnet net!smtp.east.cox.net!25
| connected to net!smtp.east.cox.net!25 on /net/tcp/0
| 220 eastrmmtao06.cox.net ESMTP server (InterMail vM.6.01.05.02
| 201-2131-123-102-20050715) ready Wed, 8 Mar 2006 02:58:33 -0500
|
|
| Any ideas ?
|
| I read and post news (NNTP) using Acme news, but acme mail still will
| not work.
|
| ---- Marina Brown

[9fans] Still picking at a wierd mail issue under Qemu...

[erik quanstrom]

my keyboard driving license should be suspeneded: that should be
	dnslookup smtp.east.cox.com mx

- erik

erik quanstrom <quanstro@quanstro.net> writes

|
| yes: upas tries to look up the mx record.
| 	dnslookup smtp.east.cox.net
| fails. there is a problem with their setup.
|
| however, upas/smtp should fall back to the a record.
| i wonder why that is not happening.
|
| the function you're interested in is in upas/smtp/mxdial.c
|
| - erik
|
| Marina Brown <marina@surferz.net> writes
|
| |
| | Here is the log of the mail failure and of a successfull telnet
| | to the smtp host.
| |
| | term% cat E*
| | smtp: dns: dns failure (net!smtp.east.cox.net)
| | term% telnet net!smtp.east.cox.net!25
| | connected to net!smtp.east.cox.net!25 on /net/tcp/0
| | 220 eastrmmtao06.cox.net ESMTP server (InterMail vM.6.01.05.02
| | 201-2131-123-102-20050715) ready Wed, 8 Mar 2006 02:58:33 -0500
| |
| |
| | Any ideas ?
| |
| | I read and post news (NNTP) using Acme news, but acme mail still will
| | not work.
| |
| | ---- Marina Brown

Re: [9fans] Still picking at a wierd mail issue under Qemu...

[Russ Cox]

> term% cat E*
> smtp: dns: dns failure (net!smtp.east.cox.net)
> term% telnet net!smtp.east.cox.net!25
> connected to net!smtp.east.cox.net!25 on /net/tcp/0
> 220 eastrmmtao06.cox.net ESMTP server (InterMail vM.6.01.05.02
> 201-2131-123-102-20050715) ready Wed, 8 Mar 2006 02:58:33 -0500

% ndb/dnsquery
> smtp.east.cox.net mx