My webmail is receiving messages, but when I try to send I get a blue error box: 'failed to send mail'.
I reported this same issue a few months ago. It seemed to affect only lineone.net and tiscali.co.uk addresses. On that occasion, the problem went away a few days later..
I haven't changed my password or any other settings; this error has just atarted again without any encouragement from me.
Best Wishes
Martin