Thanks for the replies. The thing is it's worked fine with that set up for years.
Just checked supanet's homepage again, and they now reckon that they've got problems with sending mail to their Support team, so I'm assuming that the problem is at their end and it's more wide-spread than they think (within their account group).
I'll hang fire on phoning them to confirm (IIRC £1/min). Could always buy a 2nd class stamp or get a carrier pigeon - might be quicker
