Tue, Nov 17, 2020 4:00 PM
Cannot send and email: comcast.net resomta-po-02v.sys.comcast.net CSI IP 18.104.22.168 is not permitted to send messages. Please help
6 m ago
Gold Problem Solver
@Andrzej19 wrote: ... CSI IP 22.214.171.124 is not permitted to send messages. ...
CSI in the error message means the listed IP is blocked by Cloudmark Sender Intelligence. 126.96.36.199 is assigned to NordVPN/Clouvider (see https://apps.db.ripe.net/db-web-ui/query?searchtext=188.8.131.52). Please see https://forums.xfinity.com/t5/Email-Web-Browsing/Can-t-Send-Emails-from-PC-or-Phone-App/m-p/3355422#M219767 for a discussion by @ComcastCSAEmail of how Comcast uses CSI, although concerning a different ISP in that case.