Slow internet connection, incompatible browser, and wrong IMAP/POP server configuration cause Cox mail not working issue. So, connect to a stable internet and use a browser Cox Mail supports, like Microsoft Edge, Safari, and Mozilla Firefox. Ensure that the server settings are correct. The port number for the IMAP server is 993 and 995 for POP. The SMTP port is 465. Ensure that you are using a valid password. You can reset it by tapping the 'Forgot password' option.

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