Anyone from Comcast on this list? would appreciate if you can reach out off the list. Have a few concerns regarding Comcast servers intermittently throwing 550.5.1.0 -- invalid domain errors.
https://list.mailop.org/listinfo/mailop ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com ----- Original Message ----- From: "Nathanael Cariaga" <ncariaga@gmail.com> To: "NANOG" <nanog@nanog.org> Sent: Wednesday, May 5, 2021 1:17:46 PM Subject: Comcast mail contact Anyone from Comcast on this list? would appreciate if you can reach out off the list. Have a few concerns regarding Comcast servers intermittently throwing 550.5.1.0 -- invalid domain errors.
Nathanael, You can reach out to me privately if you'd like. Typically those are related to DNS being unable to resolve an MX/A/AAAA for your 5321 Mail From domain, but I can take a better look to be sure. -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast
-----Original Message----- From: NANOG <nanog-bounces+alex_brotman=comcast.com@nanog.org> On Behalf Of Nathanael Cariaga Sent: Wednesday, May 5, 2021 2:18 PM To: NANOG <nanog@nanog.org> Subject: Comcast mail contact
Anyone from Comcast on this list? would appreciate if you can reach out off the list. Have a few concerns regarding Comcast servers intermittently throwing 550.5.1.0 -- invalid domain errors.
participants (3)
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Brotman, Alex -
Mike Hammett -
Nathanael Cariaga