I keep getting an error when trying to send e-mail:
Cannot Send Message Using Server (Null)
Use the pop-up menu below to try a different outgoing mail server. All messages will use this server until you quit Mail or change your network settings.
Message from: vjandrews vja4Him@vjandrews.com
I've been having trouble sending e-mail for the past several days. Have also received other error messages as well.