hello I am able to receive emails in Thunderbird but '''unable to send''' and this error message pops up: sending of the message failed an error occurred while sending mail: outgoing server (SMTP) error. The server responded: connection refused OB115 149 163 161 is blacklisted. If you believe this to be in error please contact postmaster@bigpond.com I have contacted the postmaster several times and he has advised that the error is due to the VPN I am connected to. Some VPN IPs have been blocked due to abuse. He suggested I bypass or disable the VPN which has now been done but I still cannot send any emails. thank you and please help