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----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com ----- Original Message ----- From: "Nathanael Cariaga" <ncari...@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.
