WebCam Monitor does not receive e-mails by connecting to mail servers. It simply sends e-mail through a mail server. If the mail server is specified then that server is used directly. Otherwise, a mail server is resolved from the domain name (gmail.com).
Simply use any one of the 5 mail servers resolved by WebCam Monitor. The E-mail Notification alert will then pick up the mail server directly and use it to send e-mails.