I just installed e-Newsletter and am setting it up for use. I have entered all the information in th

I just installed e-Newsletter and am setting it up for use. I have entered all the information in the "Outgoing Email Settings" section. When I click on "Test Connection," I get the message "Failed to send test email - Please check your outgoing email settings and server config to see if selected ports are open. Error details: The following from address failed: gavin@caledonsecurity.com: Called mail () without being connected."
I have quadruple checked the email settings, which are the same as Thunderbird successfully uses to send emails, so I assume this means the port must be open. I specified port 1025, which is the one specified by my host APlus.net. User name and password are correct.
"Test Connection" in the "Bounce Settings" section is successful.