Recently I found myself using this wonderful free service from Mail2Web on my BlackBerry. There are some email accounts that I have that I almost never use but every once in awhile I need to check. I would get a ton of spam if I hooked them up through the BIS but this solution works.
If you go to www.mail2web.com/pda from your BlackBerry browser you can enter in your username and password to see your POP3 and IMAP emails. I know this is not the most secure method since you are giving your username and password to a 3rd party but I use it for disposable email addresses that I use for spam registrations. That way I can click on the link to register from my BlackBerry.
Very cool and free. If you need to do this more often I would recommend trying out the free LogicMail application we have mentioned quite a few times in the past.
BTW: Mail2Web does offer a pretty cheap hosted BES solution but I don’t know of anybody who is using it. Might be worth a try if you want to save some cash. There are some limitations though such as Oulook Web Access only for the low level accounts.