I've double-checked my settings connectng to my POP3 server.
I have also compared Nokia 920 settings to my wife's HTC Trophy running Win7.5 using the same Optus network in Australia.
If I use my POP3 sever name of syncint.com I get an error code 80004005 on syncing.
If I change the setting to syncint.com:993:1 (which is what works on my wife's HTC) I get the error code 80072F30 (as reported in this thread).
Any assistance will be gretly appreciated.