For me, MfE is working OK, perhaps because I have it configured to sync only previous 30 days.

Another IMAP server (actually hosted Exchange) performs horribly. Like many, I just keep all my email in my inbox and use search to organize / find. I tried paring my inbox and sent email (largest folders, had probably 10 years of email in them) to about 300-700 messages and archiving the rest temporarily to test, but the client still crapped out.

Anyone having success against IMAP with any size folders? Or is it a folder size independent problem.

This is why I'm running an E71 in parallel (decent MfE performance and great IMAP client with profimail) and I have faith that Nokia or a 3rd party will address this before long. I'd like to get rid of the E71 and rely on just the N900.

My experience with the N900 has been great, seem more errors of omission than comission. But the email client is an exception. I probably would have been happier if they left it out and promised a decent mail client in a committed to future firmware release.

I've resorted to the browser to do IMAP email.