It’s rare these days when I come across any app that makes me say, "Wow, now this is useful!" Yahoo’s Zimbra Desktop is one of them.

When it comes to email, there are many who prefer the convenience of web-based mail but wish there was a local application that looked and acted like a mail client. Zimbra Desktop is it. This software absolutely nails it in terms of friendliness, ease-of-use, convenience and everything in between.

First of all, it’s multi-platform. Windows, Mac or Linux. Any truly good application these days supports all three, and this does.

Second, it has support for multiple types of email:

Zimbra, Yahoo! Mail, Gmail, Hotmail, AOL Mail, two types of IMAP and POP.

It always pleases me when I see an offering by a major player like Yahoo! that is willing to support a competitor’s product like Hotmail or Gmail because it shows confidence in their own offering.

It should be noted however that only some Hotmail accounts are supported due to compatibility issues. Most will be, but if yours doesn’t connect, the software will explain why.

Third, look at this interface:

Slim, clean and super-easy. Look at the tabs on top. Contacts, Calendar, Tasks, Documents and so on are all just a single click away. Folder support is easy too.

Oh, and speaking of which, did you ever want your Gmail account to have accessible "normal" folders like all other webmail does? It will when you use Zimbra. Simply add a folder via a connected Gmail account, and it will create nested folders that look and act just like normal ones – and yes they’re completely accessible via the regular Gmail interface as well.

Fourth, although this sounds a bit dopey I really dig it – a mail indicator icon in the taskbar in Windows when new mail arrives:

The yellow envelope is the new mail indicator. This seemingly insignificant feature is just so nice to have.

Fifth, yes it has multiple account support. In the screen shot above, look on the left sidebar. Your other accounts are listed at the bottom and can be accessed easily with a single click. If there is any new mail in accounts lists there, there is a small number in parentheses telling you how much new mail there is.

Sixth is the synchronization features. Using Yahoo Calendar and Contacts? It will sync seamlessly. Using Gmail’s version? It’ll sync that too.

It goes without saying that Yahoo! Mail users will appreciate Zimbra the most because it FINALLY brings a true native client to the desktop. This is Yahoo’s equivalent of Windows Live Mail and it does a fine job even though it’s beta software.

And yes, it’s beta. That means some things may go buggy from time to time. But in my use of it I’ve encountered no issues as of yet.

The way Zimbra works in Windows is by installing itself as a service. You will see a small red icon in your taskbar (when no new mail is present) like this:

This is not a bad thing whatsoever, because when the Zimbra client is minimized, it goes completely out of the way and shrinks to this little icon, which can be clicked to bring the client back up. In addition, it can be right-clicked to completely shut down the service.

Zimbra Desktop was definitely done right the first time. It is the only software I’ve seen that offers a true alternative to Windows Live Mail (especially if you don’t use Hotmail) and the feature set is just plain great.

Oh, one last note. This may be a frilly feature but still worth mentioning. It has 12 different themes you can use:

This is available via the Options tab.

Let’s say for example you want Zimbra to look like Gmail. You would choose "Zmail." This is what it looks like:

Looks pretty close to Gmail, doesn’t it?

Zimbra’s dev team really thought this product through.

As said at the top of this article, this is a product that accesses web-based mail but still retains the total look and feel of a local mail client – and has the very-super-awesome-cool sync features like Windows Live Mail does, so it isn’t an island unto itself whatsoever.

Two huge thumbs up for Zimbra Desktop. You’d be very hard pressed not to like this.