I've just realised what happened. After today's Lucid package update (which was for things like dbus), Evolution 'decided' to 'Work Offline' without any request from me and no dropping of line. So I set it to 'Work Online' and it's now OK.
I've just realised what happened. After today's Lucid package update (which was for things like dbus), Evolution 'decided' to 'Work Offline' without any request from me and no dropping of line. So I set it to 'Work Online' and it's now OK.