SMTP Email Error ECE3006A: Unable to send notification e-mail.The transport failed to connect to the server.
Symantec Endpoint Protection is blocking the e-mails.
Allow the SEP program to send e-mails under Centralized Exceptions option both at the client end and at the central level.
Applies To
Unable to send notification e-mail where Symantec Endpoint Protection (SEP) is installed.