I get the following error message when trying to send an email: "Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp-server.wi.rr.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again." I can send an email from my iPhone without a problem. I have two other Thunderbird email accounts on my iMac which wok fine. I have compared settings on all three accounts and they are the same. Thankyou