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New Contributor
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AUP#CXSNDR continues to be a problem when sending with attachment
An error occurred while sending mail. The mail server responded: <**********@cox.net> message rejected. Refer to Error Codes section at www.cox.com/.../email-error-codes.html for more information. AUP#CXSNDR. Please check the message and try again.
GilaMonster21
New Contributor
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Your email failed authentication checks against your sending domain's SPF, DomainKeys, or DKIM policy.
How do I authenticate on the Cox domain? I've had this account for many years.
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