On Fri, Apr 03, 2020 at 03:16:30PM -0300, SysAdmin EM wrote:
> I am seeing the following error in some email directed to hotmail:
>
> <lachec...@hotmail.com>: host
> hotmail-com.olc.protection.outlook.com[104.47.46.33] refused to talk to me:
> 501 5.5.4 Invalid domain name
> [BN3NAM04FT008.eop-NAM04.prod.protection.outlook.com]
Is that the human-readable portion of a bounce message?
The "refused to talk to me" error happens only when the server presents
a 4XX or 5XX banner or responds with 4XX/5XX to EHLO. But it is odd
that the alleged invalid domain name is theirs and not yours...
Did this happen just once, or is it still happening with new messages?
Can you report the output of:
posttls-finger hotmail.com
(if posttls-finger is included in your OS Postfix package, or you're
willing to build it from the upstream Postfix source).
> Return-Path: <facturac...@zonanet.com.ar>
> Received: from smarthost04-ded.dattaweb.com (localhost [127.0.0.1])
> by smarthost04-ded.dattaweb.com (Postfix) with ESMTPS id 2D3959201C6
> for <lachec...@hotmail.com>; Fri, 3 Apr 2020 09:42:20 -0300 (-03)
Please post the log file records for queue id "2D3959201C6" plus the
usual "postconf -n" and "postconf -Mf" output.
--
Viktor.
