When trying to send email, I get this error message and the email does not go through.
"An error occurred while sending mail: The mail server sent an incorrect greeting: resomta-po-02v.sys.comcast.net resomta-po-02v.sys.comcast.net Excessive failed authentication, ESMTP server temporarily not available."
Is there anything I must do or is this an internal probelm.
If an employee doesn't help you here, try giving Comcast Security Assurance a call at 1-888-565-4329 (from https://constantguard.xfinity.com/help/report-abuse/). Note that this is NOT one of the general customer service numbers.
The first-line reps there are sometimes not very helpful. If so, be persistent, and keep at them until you get a satisfactory answer.