As of right now there is no solution for the Nokia E71 and Blackberry Connect. But if you need BB Connect like speeds on your E71 than looks no further than Seven beta email application. I've been using it on the Nokia E71 for a few days now and I couldn't be happier.
Seven uses a data or Wlan connection to always stay connected to your inbox. I find it more reliable than the built in email application especially when you lose a connection. Seven reconnects fast and updates your inbox while sometimes I find the built in application isn't connected. I've also tested the retrieval speed and Seven is fast. Within seconds the email appears on your phone sometimes faster than on my computer desktop. Keep in mind it uses your messaging application instead of it's own layout. You will always have the Seven application running in the background.
Perhaps my favorite feature is that Seven downloads more than just your header on the E71. You can set it to download X amount of KB from each message. The default number is 10kb and so far I haven't had to spend any time retrieving a message, unlike the default IMAP setting on the built in application which makes you manually retrieve each header.
To use Seven you must sign up for an account with them and they send you a link to the download page on your phone. Right now they don't have the Nokia E71 listed but the E90 version works just fine for me.
A few other things. I've only used it to connect to my Gmail account. I'm not sure how it works with other services. All you need to do is enter your username and password of your Gmail account and the rest of the settings will happen automatically.
According to their website, you can download the following versions of the application.
Yahoo, Gmail, AOL, Hotmail/MSN or other POP/IMAP email services
Out of Office™
Corporate email on Microsoft Exchange (Exchange 2000 and 2003), where Outlook Web Access is enabled.
Corporate email on Microsoft Exchange (Exchange 2000, 2003, and 2007), Lotus Domino (versions 6, 6.5, and 7), or POP servers behind the firewall, for up to 25 users on a single installation.
Corporate email on Microsoft Exchange (Exchange 2000, 2003, and 2007), Lotus Domino (versions 6, 6.5, and 7), or POP servers behind the firewall, for up to 1500 users per connector installation.
Once you get everything set up on your phone there are plenty of settings to play with. One thing I recommend is to set your log level to "fatal" so that the application doesn't create unneeded logs of everything you do. This will only slow down the application.
Another great thing about this application is it allows for multiple email accounts. Zach from Symbian In Motion mentions in one of his articles about Seven...
Sure there are still a few issues with the SEVEN email solution, but nothing is perfect. The latest version of SEVEN’s beta is truly terrific though. I have all six of my main email accounts loaded up and it handles them in stride. Exchange, Lotus Notes, POP, IMAP; it pushes them all to ensure your email is in your hands in a timely fashion, regardless of protocol. It syncs my contact with exchange, supports a variety of great functionality and to be frank it’s essentially the only available solution that meets my needs at the moment.
Of course you may run into some slight problems like with any applications but the great thing is Seven is free. So if you don't like it just delete it off your phone.
Click here to go to Seven's homepage and get started. Let me know if it works out for you.