Will Instant Messaging Ever Unite?

scallion writes "An article in Technology Review titled Getting AOL To Talk To MSN points out that currently the world of instant messaging is "as factionalized as Afghanistan," then asks, what will it take to unite all these individual IM networks under one umbrella?"

Comments

AOL's proposal

[Phroggy]

AOL's proposed solution, which was submitted to the IETF. Nobody, including AOL, really takes it seriously. I'm not entirely sure why.

Basically, the concept is this: anyone - AOL or Microsoft or Yahoo or Joe Blow down the street - can run their own IM service. Every IM user has a username/screen name, and every IM service has a domain name (aol.com, hotmail.com, yahoo.com, joeblow.net). All you need to send an IM from one service to another is the username and domain, which would look like an e-mail address and might actually be an e-mail address.

When you send e-mail from one address to another, you send the message to your (ISP's) SMTP server, which looks up the domain name you're sending the message to, gets the SMTP server defined in the MX (mail exchange) record for the domain, and sends the message there. Under this proposal, a new record type would be added to DNS, an IMX record that specifies which server can handle IM connections.

So, say you're on Yahoo Messenger. You want to send an IM to another Yahoo user, Yahoo takes care of that and it's nobody else's business. You want to send an IM to an AOL user, you send it to Yahoo's servers, Yahoo lookup aol.com and contacts the server defined in the IMX record. For security AOL looks up the IMX record for yahoo.com too, and they do a three-way handshake. The message is sent, and it appears to the AOL user like an IM that came from joebob@yahoo.com.

Of course for redundancy and load balancing there can be multiple IMX records, just like there can be multiple MX records for e-mail. It's been awhile since I read the proposal; there's more to it than that. It may not be perfect, but it would have been an open standard that anyone could use, not limited to just the big companies.