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Like many people, I use gmail exclusively to send and receive all of my cox emails. It is configured correctly with the right passwords, TLS, ports, etc (I have confirmed with Cox). Gmail dutifully grabs all of my Cox emails, etc. All of a sudden, however, while I can still RECEIVE all cox emails at gmail, SOME (not all) of my OUTGOING emails come back with the following error message. I am out of settings to try. If you have a fix for this, please let me know. Cox blames it on gmail.
The response from the remote server was:
554 cxr-obgw-6002a.stratus.cloudmark.com cmsmtp 188.8.131.52 blocked. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html for more information. AUP#CXBL
P.S. I have already tried deleting the Cox account from gmail and adding it back in.
P.P.S. To make matters more complicated, sometimes I get the error message telling me the message was not delivered, yet I also get a reply from the recipient.
P.P.P.S. Should I be checking the "treat as an alias" box in the gmail settings for my cox email address?
Minnie L said:184.108.40.206
Looks like one of Gmail's server is blacklisted with SORBS. Most email providers don't use SORBS for their history of false negatives, but it looks like Cox's does. The entry has been active since April 29th. Do you run any mailing lists by any chance?