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jill_r_'s avatar
New Contributor

SMTP error using New Outlook

When is Cox going to upgrade their platform to solve the outgoing email sending error that happens with the new Outlook???

The only way I can send an outgoing email is to exit Outlook and log in to webmail. Your support desk confirmed that Cox is not yet updated to work with the new version of Outlook. VERY ANNOYING.

Technical details

SmtpSubmissionPermanent5XXException: Smtp submission failed. Server '' Port '465'. --> Unexpected SMTP server response. Expected: 250, actual: 503, whole response: 503 not available
Failure code: 5513