I had a few strange problems when using the standard email application on the N73. After setting up a POP3 account, I noticed that, after selecting �Delete on phone and server�, it actually did not delete the message on the server. Also, but that�s just a functional limitation on the N73 email application, it does not clean up the list of emails. It just puts a cross through the email. With a lot of spam, the list can become very big during a longer stay from home.
So, I created an IMAP account referring to the same mailbox. Now, it appeared that I could delete messages on the server AND on the phone. However, most spam messages could not be deleted. I don�t know why. When I tried to delete the message, it jumped out of the email application to the today screen.
I now purchased the ProfiMail application. Although the look & feel is not spectacular (colors and fonts can be improved), the functionality is fantastic. In order to save traffic with my GPRS account, there are 3 levels of download. First, just get the headers of the messages. Then, if clicking on a message, get just 2 kb (can be changed) of the message. This allows you to see the message body, when there is a big attachement to the mail. Then, if you really want to see the whole thing, select �download�.
Also, deleting messages, with which I experienced problems with the default application, works flawlessly.
Tom