Thanks for all the replies everyone! If I knew there was going to be this many hellos, I'd have brought a bottle
PST - yes, it's the extension for the Outlook data file. (Want to stay with OUtlook for now because of the calendar (aka surrogate memory) integration.)
Want to move to IMAP so the mail on my notebook, desktop and web are sync'd (we all do a lot of international travelling).
Guess I'll give Fastmail a go then, but appreciate the replies!
A