Forum Discussion

Hugo_Palacios's avatar
New Contributor
5 years ago

Cannot Send e-mails using Webmail *** From Overseas ***


I am COX customer from many years, something was changed from SMTP On_Going e-mail

I can read mails using Webmail, .... But I cannot Sending mails.

Currently in Lima - Peru, and I have an excellent Internet Speed. But I can't send mails. IT IS BLOCKED.

I need to send a very Important e-mail, but I cannot.

This is the Error I got after I press sens, a window popped-out :

Message could not be sent to the following recipients: [] (550 - 550 blocked.
Refer to Error Codes section at for more information.

I do not want to call (405) 600-7676  to activate my account.... Cox should do it for me.


1 Reply

  • When accessing your email outside of the country, there is an added layer of security that prevents mail from being sent out using Cox email servers to prevent spammers from using our servers to send out spam. This is likely why you are seeing this message. We will need to put in a ticket to our mail team to have your account white-listed temporarily so that you can send email while out of the U.S. If you happen to have an alternate email account, you can email us at or you can also reach us on Twitter (@CoxHelp) or Facebook.

    Cox Support Forum Moderator