Cox is blocking outgoing emails with content Cox apparently censors
I have collected several examples of this problem. I spoke to tech support, they refused to believe me. They were polite - they just refused to believe that the bounce backs were content-based.
Sometimes I was forwarding email, but sometimes I wrote my own original email including information critical of the Covid-19 panic and government policies, and I included links to highly reputable websites on the subject. No profanity or obscenity, no attachments, nothing weird. Cox bounced back the outgoing email to all recipients, with this message for each one:
550 [destination email address] message rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html for more information. AUP#CXSNDR
One of the destination email addresses was my own gmail account.
I have reproduced this issue -- I have the emails and rejections to show: Cox is blocking the outgoing email based upon content.
Whom do I write to within Cox to complain about this censorship? Does anyone know?