I receive emails but am unable to send them. I get a 'System Administrator error' message. When pressing 'Send' a box appears with a message 'The server you are connected to is using a security certificate that cannot be verified. The target principal name is incorrect.'
I have attempted to rectify this with Talktalk through the online BOT, real people after the BOT and on the phone several times. The process ceases without satisfaction. Hours spent so far without success. Does anyone have any ideas please?
