This week I tested Postbox 1.0, a program designed to handle your email in a smart, helpful manner. Starting Wednesday, this program is available at www.Postbox-Inc.com. Postbox sorts through your email and detects its contents so you can see Web links, photos, contacts and other items themselves with one button click—whether Microsoft Word (MSFT) documents, PDFs or spreadsheets—without digging through messages. Since its inbox is constantly being indexed, all search queries return near-instant results.

Postbox uses an Inspector Pane on the right side of each email to extract and display elements like images, attachments and contact information.

Postbox’s founders come from Mozilla Corp., maker of the popular Firefox browser, so Postbox is based on Mozilla technology and its security standards. Email is indexed locally on your computer, so none of it is sent back across the Web to Postbox. It uses Content Tabs (tabs are another feature borrowed from Firefox) to help visually organize folders, messages and content extracted from those messages. It displays the most important elements of each message in a right-side panel. Received emails can even be edited so they aren’t sitting in your inbox with subject lines like, “Fw: Re: Re: Sept.” Instead, you can rewrite the subject to something like “Flight times.”

But this program isn’t free like Gmail, Hotmail or other Web-based email programs, nor does it come preloaded on a computer the way Apple Mail (AAPL) is on every Mac. Users can try Postbox for a free 30-day trial period after which each license costs $40, allowing one person to use their license on multiple computers (i.e. at work, at home, on a laptop). For another $20, a Family Pack option will give up to five family members use of Postbox. An additional $25 buys a Lifetime Upgrades plan that entitles you to receive free of charge any major version of Postbox that’s released; other nonmajor releases are free upgrades.

I used Postbox on a Mac and a Windows Vista computer, filling it up with thousands of emails from Gmail, Hotmail and .Mac accounts. It didn’t run properly on my company-issued computer, which is plugged into a network firewall. Postbox says it supports open protocols like IMPAP, POP and SMTP, and that it would work with Microsoft Exchange if Exchange were set to use those open protocols.

For all of Postbox’s terrific features, it can be hard to suddenly see your email in a different way since most of our email programs haven’t changed much in years. Outlook, for example, has plenty of hidden features that many people never learn how to use. Postbox seems to know how slow users are to adapt to change and so it reveals many of its features whenever it gets the chance.

For example, Postbox pops up an alert that shows you how to connect this email program to Facebook and Twitter so that you can post status updates or tweets without leaving your email. These connections also let Postbox try to pull one representative photo for each of your email contacts by matching a name in an email with someone’s Facebook or Twitter name—if you follow the person. It also uses photos assigned to contacts in the Mac OS X address book, which is used by Apple Mail.

Or take a feature in Postbox called Topics. This is a way of auto-organizing messages into different groups after you label them as being part of a certain topic, say “Mom’s Birthday.” All messages in an email conversation are grouped into “Mom’s Birthday,” as are any future responses to the same conversation. Postbox gives you three ways to label an email conversation as being part of a certain topic: from the toolbar, using a Topics button in the message header or by pressing “T” from within a message. You can also select a topic as you’re composing an email, pre-sorting that conversation into a designated topic.

Not everyone will like Topics because, however helpful the feature is, it makes the user do more work when he or she just want to get through a huge pile of unread emails. Labeling each email with a certain topic doesn’t take long, but it’s still an extra step. I would like Postbox to create automatic topics for sorting emails. For example, I recently sent and received at least 50 emails related to rescheduling tennis matches. Even though all the messages had the word “tennis” in them, not all of them were related to the same email, so they wouldn’t sort into the topic I created, “Tennis Make-Up.” Postbox says it has considered automatic options like these and may try to incorporate something similar in future versions of the product.

If my 30-day trial ran out tomorrow, I’d miss Postbox’s Inspector Bar the most. This feature works like a filter, instantly sucking out the most important parts in each email—including messages, attachments, images or links—and displaying them in a blue, right-side panel.

Another useful tool in Postbox is the Compose Sidebar. This also appears as a right-side panel but it shows up when someone is writing an email. This panel can display attachments, images, links or contacts found in all emails so you can simply drag and drop that item into your email as you’re composing it. This took me a while to get comfortable using because I’m so used to hunting through emails for things that I need to find. But once it became a habit, I found myself using the Compose Sidebar often.

If you have Postbox running in the background and you get an email, small notifications appear in the bottom left of your screen telling you which email account received the message and who sent it.

In the Content Tabs, which fill up with all attachments, images, links or contacts found in your indexed email, a feature called the Action Bar lets you save, send, or instantly glance at a document. This saves you from opening each email and its attachment, a process that sometimes requires opening a slow-to-open program to see the document. A slider in this Action Bar lets you adjust the size of images from small to large.

Postbox shines a unique light on email and the way we work with it every day. Not all of its features will come naturally for long-time users of the same email program. But for someone who wants a fast search option built into email, Postbox is a winner.

Edited by Walter S. Mossberg.

Email mossbergsolution@wsj.com

AOL’s AIM started out with enough popularity to freely ignore the need to integrate with other programs; now, it can be argued that AIM retains its relevancy by operating with other messaging programs like Google’s Gmail chat and Apple’s iChat. Other IM clients paired up with one another to increase usability, like when Microsoft and Yahoo became interoperable over two years ago.

But nowadays, social-networking offerings — like leaving messages on Facebook walls and receiving Twitter “tweets” from friends — compete with traditional instant-messaging programs. And advanced technology in mobile devices has helped these chats move from desktops to iPhones and BlackBerrys, where conversations can continue on-the-go, using mobile applications.

Three free programs — Meebo, Adium and Digsby — work by consolidating numerous messaging accounts into one combined program.

This week I tested three free programs that seem to acknowledge the fading star of isolated instant messaging, as we once knew it. Meebo, Adium and Digsby work by consolidating numerous messaging accounts into one combined program. Some of these include social-networking integration or even built-in email notifications, turning the service into a one-stop shop for online communication. The result can save people from choosing one IM system over another.

All three of these programs are straightforward and work without much effort or instruction. They require users to enter the user names and passwords to log onto each IM account, which may make some people uncomfortable, even though each site explains its privacy policy. Of the three, Digsby offers to integrate with the greatest number of programs all at once, including instant messaging, email and social-networking accounts. It also lets people handle email by deleting or sorting it directly in the IM window, which neither of the other programs does.

But Digsby isn’t yet usable on Macs or Linux, and Adium (the second-best offering) is available only on Macs. When used with the correct operating system, these programs perform as promised, easing communication overall and saving people the hassle of logging into various accounts — or missing out on chats with friends because of not signing into certain programs.

Meebo, www.meebo.com, is the only one of these three products that is completely Web-based. It works on all major browsers, including Internet Explorer, Firefox and Safari, and doesn’t require any installation — a plus for those who would like to be using instant messaging in the office but aren’t able to install software on corporate computers. It can log users into one of six messaging programs simultaneously, including Yahoo, Microsoft, AIM, Google, ICQ and Jabber.

I signed onto three instant-messaging accounts at once on Meebo by entering the username and password for each and selecting one overall “Sign In” button, which logged me into each program simultaneously and displayed all of my contacts in one condensed panel. Meebo can be configured to automatically launch within Firefox if a Firefox extension is downloaded.

Meebo.com is also usable on the iPhone and iPod Touch, allowing people to log into multiple accounts simultaneously from their mobile device. As of now, neither Adium nor Digsby has an application that allows it to work with the iPhone or iPod Touch.

Digsby, www.digsby.com, was a cinch to set up on my laptop, which was running Windows Vista. It walked me through the steps of adding accounts from instant-messaging programs, email accounts such as Gmail and Hotmail, and social-networking sites such as Facebook, MySpace and Twitter. Digsby works with IM and emails accounts from AOL/AIM, Yahoo, Microsoft and Google. Jabber, ICQ and Facebook chats also work with Digsby, along with IMAP and POP email accounts.

Once added, all of these accounts are represented in one clean panel. These consolidated communication programs saved me many extra clicks on my computer over a weekend, and I easily chatted with friends while checking messages. New emails received in my Gmail account were visible in a preview panel that popped up when I moved my cursor over the email account name. Right within this email preview panel, I could delete or archive each message; I was also able to mark a message as read or report it as spam. I performed all of these email tasks without opening my Gmail account in a browser or email client. Shortcuts in this preview panel labeled Open, Compose and Inbox sent me to my browser to perform these more-involved tasks.

This in-line functionality also applies to other email accounts, according to Digsby. But though I could see a tally of newly received Hotmail messages in my Digsby preview panel, these messages weren’t as interactive as those received in my Gmail inbox.

Digsby also tracks Twitter alerts and timelines, as well as Facebook newsfeeds and alerts — including posting notifications in your Digsby panel whenever someone “friends” you on Facebook.

Adium, www.adiumx.com, wins points for cuteness. The downloaded program is represented by a goofy, green duck, which plops itself in the Mac operating system dock and closes its eyes when not in use. When new messages are received via Adium, this duck flaps its wings until you open the message. The Adium user interface incorporates sleek visuals, such as status windows that gracefully float above user names whenever a cursor moves over these names.

Adium works with AIM, ICQ, .Mac, Jabber, Google Talk, Windows Live Messenger and Yahoo Messenger. Adium supports new email notifications for some accounts, but doesn’t enable reading or sending email within the program. Instead, it offered to open my account via the browser or using Microsoft Entourage on the Mac. Social networking is limited to MySpace IM on Adium, though the next version will support Facebook Chat.

Adium organizes multiple conversations using tabs stacked at the bottom of a chat window. Icons line the top of each chat window, such as a file icon for transferring files and a lock that switches a conversation to be encrypted and off-the-record. Any conversation that isn’t designated encrypted is automatically stored in a table of Adium transcripts, which can be sorted by To, From or Date. Transcripts can be sorted using rough timelines like “within the past two weeks” or “since yesterday.”

I saved myself time and mouse clicks by using these three consolidation programs, though I preferred Digsby in the end because of its intuitive email integration. These programs will help to take down the instant-messaging barriers that have become turn-offs over the past couple years, and may better integrate IM with the social networks and mobile devices that are on the rise.

Edited by Walter S. Mossberg

Write to the Mossberg Solution at mossbergsolution@wsj.com