RE: Comcast.net email servers - temporarily blacklisted IP Address errors

2024-06-07 Thread Brotman, Alex via NANOG
Hey folks, Someone forwarded this directly to my inbox, much appreciated. We’ll work with Martin to get this sorted out. -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast From: NANOG On Behalf Of Martin Cook Sent: Friday, June 7, 2024 2:15 PM To: nanog@nanog.org Subject: Co

RE: IPv6 connectivity to mx[1-4].smtp.goog.

2024-02-27 Thread Brotman, Alex via NANOG
We are seeing the same, but seems like it's mostly affecting delivery for broadcom.com, and a few other smaller domains. However, connectivity to the MX listed by gmail.com (and most other domains using GSuite, etc) are working fine over IPv6. You may also want to ask the mailop list. -- Ale

RE: The Reg does 240/4

2024-02-16 Thread Brotman, Alex via NANOG
We (comcast.net) have been sending/receiving via IPv6 since 2012 or so. We do have PTR records for our outbound IPv6 addresses, and expect them for inbound IPv6 as well.Keeping in mind that a huge portion of inbound mail is bulk/commercial and they have thus far largely avoided IPv6, Inboun

RE: Looking for contact within Comcast Xfinity

2022-08-24 Thread Brotman, Alex via NANOG
Michael, Please contact me off-list and I'll see if I can be of any help. -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast > -Original Message- > From: NANOG On > Behalf Of Michael Brown > Sent: Monday, August 22, 2022 4:18 PM > To: North American Network Operators' G

RE: Xfi Advances Security (comcast)

2021-09-13 Thread Brotman, Alex via NANOG
https://spa.xfinity.com should have a form to request removal. Note they say resolution time can be up to three business days -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast From: NANOG On Behalf Of Jason Kuehl Sent: Friday, September 10, 2021 10:31 AM To: NANOG Subject:

RE: Comcast mail contact

2021-05-05 Thread Brotman, Alex via NANOG
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/ 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 Mess

RE: Comcast/Xfinity blocking my domain

2020-09-07 Thread Brotman, Alex via NANOG
If you send me a message off-list, I’ll see if I can get it routed to the proper team. Thanks -- Alex Brotman Sr. Engineer, Anti-Abuse & Messaging Policy Comcast From: NANOG On Behalf Of Octolus Development via NANOG Sent: Friday, September 4, 2020 5:24 PM To: Mikael Abrahamsson via NANOG Su