Treo 600 - Problems with Mail

  miner 09:53 16 Nov 04

I've just bought a s/hand Treo 600 (unblocked Orange, now on O2)on which I'd set up my mail preferences - all was fine.
Now I find I can only access mail as webmail through the Web (long-winded)and my mail preferences have disappeared completely - there is nowhere for me to enter them again.
The only thing I can think of is that I removed the SIM card at one point, while the phone was still on, ditto the expansion card - could this have caused the problem?
If so how can I get back to where I was?

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