Apologies to anyone expecting quick email response. Outlook has just locked on me. I doubt it is the upgrades I just installed (but it's possible - MSN made a real mess last week when it tried to take over Port 25). If so I'll roll the system back. My ISP has, however, announced a problem with email, and it was like this a week or so ago, too, so it may all come good.
Give me time, I am sure I can get it going again, or maybe just pick up my POP mail through other channels (depends if it is Outlook having problems or the server itself).