On Thu, Aug 21, 2014 at 11:13:44PM +0200, Fabio Riga wrote:
> Il 21/08/2014 22:38, Giovanni Bechis ha scritto:
> >try this one:
> ># /etc/rc.d/smtpd stop && smtpd -dv
> ># smtpctl trace smtp
> >Post your logs.
> >
> >Anyway I tried from my smtpd server (~OpenBSD 5.6) and it is working fine.
> > Cheers
> > Giovanni
> Dear Giovanni, thanks for your help. I found the solution trying to connect
> to a mx server via telnet (from my server) and this is the result:
>
> [fabio@mail ~]$ telnet mxd1.aruba.it 25
> Trying 62.149.128.160...
> Connected to mxd1.aruba.it.
> Escape character is '^]'.
> 554 mxcmd04.ad.aruba.it bizsmtp hYzf1o0274Aa5Bp01 Connection refused from
> 149.210.142.193. See
> http://csi.cloudmark.com/reset-request/?ip=149.210.142.193 for more
> information.
> Connection closed by foreign host.
>
> So my server is blacklisted by this cloudmark, I just sent the reset request
> and hopefully I'll resolve the problem. Anyway, openSMTPd didn't report
> this. Another blacklist system was blocking me some time ago and was
> reported in the log. I don't understand why this wasn't found.
>
> Cheers,
> Fabio
>
ehlo,
The reason is simple and not what you guys think.
The MTA has a logic that it tries to find a MX where it can establish a
valid session (go beyond EHLO) otherwise it considers the host broken
and passes to the next MX.
In this case, we detect that the first MX was broken and try to pass to
the next MX before reporting a failure on the message. However, we also
forget to log th reason why the first MX was broken.
This is a bug, not a feature, a ticket has just been opened:
https://github.com/OpenSMTPD/OpenSMTPD/issues/483
--
Gilles Chehade
https://www.poolp.org @poolpOrg
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