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From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: Still not possible to send mail to domain libc.org
Date: Thu, 23 Apr 2015 18:33:28 -0400	[thread overview]
Message-ID: <20150423223328.GK17573@brightrain.aerifal.cx> (raw)
In-Reply-To: <55396A52.8050904@gmx.de>

On Thu, Apr 23, 2015 at 11:55:30PM +0200, Harald Becker wrote:
> Hi Rich,
> 
> extending my search on qhe net I found the following:
> 
> All of the senders experiencing the bounced messages mentioning
> cname lookup failure appear to be running the qmail mail server
> software.

Again there are no CNAMEs involved.

> Qmail, if not using a third party patch that was written in the late
> 90’s, has an issue sending to domains whose name servers respond to
> DNS queries of type “ANY” with more than 512 bytes of data; that is
> a bug in qmail and the author has never fixed it because he wants
> you to use his DNS server software which also eliminates the issue
> in a different way.

Responses larger than 512 bytes are not supported over UDP and are
rarely used. I saw some replies close to that long but none of them
had the TC (truncation) bit set, so I don't think that's your issue
either.

Rich


  parent reply	other threads:[~2015-04-23 22:33 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-23 18:38 Harald Becker
2015-04-23 19:59 ` Rich Felker
2015-04-23 20:14   ` Harald Becker
2015-04-23 20:52     ` Rich Felker
2015-04-23 21:25       ` Harald Becker
2015-04-23 21:43         ` Harald Becker
2015-04-23 21:44         ` Rich Felker
2015-04-23 22:04           ` Harald Becker
2015-04-23 21:55         ` Harald Becker
2015-04-23 22:08           ` Harald Becker
2015-04-23 22:20             ` Harald Becker
2015-04-23 22:28               ` Harald Becker
2015-04-23 22:33           ` Rich Felker [this message]
2015-04-23 22:48             ` Harald Becker
2015-04-23 23:20               ` Rich Felker
2015-04-23 23:38                 ` Harald Becker

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