Third-party Client Reminder
Just a reminder that Xfinity requires all users who are using a third-party email client to utilize SMTP Authentication (or OAUTH if possible) when sending messages via our Residential Platform, using an Xfinity user account. This could include desktop clients (e.g., Outlook or Thunderbird), mobile clients (e.g., Outlook Mobile, Gmail, iOS Mail, etc.), or devices such as printers/copies/security cameras. In order to properly authentication, your application must also use TLS (SMTPS on port 465 or STARTTLS on port 587). Please see the link below on how to configure common third-party clients:
And you may need to adjust a setting to enable third-party client access for your account:
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
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