Ale,

Send me a private message with the details of your connection.  I'll see what I 
can find.

--
Alex Brotman
Sr. Engineer,  Anti-Abuse & Messaging Policy
Comcast
________________________________
From: Alessandro Vesely <ves...@tana.it>
Sent: Saturday, December 4, 2021 7:07:55 AM
To: Brotman, Alex <alex_brot...@comcast.com>; '(mailop@mailop.org)' 
<mailop@mailop.org>
Subject: [EXTERNAL] Re: [mailop] comcast.net MX

On Thu 02/Dec/2021 19:55:37 +0100 Brotman, Alex via mailop wrote:
> Folks,
>
> You may or may not have noticed we've been moving some things around.  We've 
> published new MX records, and have moved traffic over.  The old MX records 
> will cease to exist shortly.  If you're somehow fixated on those old MX 
> records or associated IPs, your traffic to comcast.net recipients may not 
> work much longer.
>
> Please let us know if you have any questions or concerns.  Thanks


I get
;; ANSWER SECTION:
comcast.net.            300     IN      MX      5 mx1h1.comcast.net.
comcast.net.            300     IN      MX      5 mx2h1.comcast.net.
comcast.net.            300     IN      MX      5 mx1a1.comcast.net.
comcast.net.            300     IN      MX      5 mx1c1.comcast.net.
comcast.net.            300     IN      MX      5 mx2c1.comcast.net.
comcast.net.            300     IN      MX      5 mx2a1.comcast.net.

Are those new or old ones?

I'm unable to send mail to comcast.net since a couple of days. The server fails
saying "Did not find a suitable MX for a connection".  When I tried manually
mx1h1.comcast.net, the connection was closed before I could type "mail from".


Best
Ale
--




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