UPDATE: I was right, tonight Google announced Google Groups is now part of Google Apps for Domains!

This morning I noticed a change in the way emails sent to a group (formerly known as list) email address on google apps for domains appear. Below is an example of the bottom of the email headers on an email sent to one of my groups on nick.pro:

On the other hand here is the bottom of the email headers on an email sent to that same group today:

As you can see in these images, a few new list specific header lines have been added that make lists appear more like they were handled by more traditional mailing list software, rather then a simple email forwarder.

I've confirmed this change seems to have happened today as emails to groups as recently as yesterday do not have the additional headers, while emails to the same groups today have the additional headers, hop past the break to see a breakdown of the 4 new headers and what I think this change means:

NickMoline: RT @tbbtsite CBS’s New Ploy: Get a TV Clip of TBBT with Your Magazine - Wall Street Journal. http://bit.ly/12uiag

See original: RT @tbbtsite CBS’s New Ploy: Get a TV Clip of TBBT with Your Magazine - Wall Street Journal. http://bit.ly/12uiag

NickMoline: RT @danvuquoc: I'm glad Firefox isn't 64-bit yet, because then it could allocate more than 4GB of memory to itself. *cringe*

See original: RT @danvuquoc: I'm glad Firefox isn't 64-bit yet, because then it could allocate more than 4GB of memory to itself. *cringe*

NickMoline: I should have known it was you... RT @TheRaj: Dude. I think I just took down GMail. I knew I shouldn't have hit Refresh...

See original: I should have known it was you... RT @TheRaj: Dude. I think I just took down GMail. I knew I shouldn't have hit Refresh...

NickMoline: What Google has to say about the GMail Outage http://bit.ly/3v3rjh

See original: What Google has to say about the GMail Outage http://bit.ly/3v3rjh

NickMoline: GMail offline, Google's 1999 Fail Whale showing http://twitpic.com/g49wd

See original: GMail offline, Google's 1999 Fail Whale showing http://twitpic.com/g49wd

NickMoline: RT @arstechnica: Psystar, fined $5K, files Snow Leopard suit in Florida - http://arst.ch/6yi

See original: RT @arstechnica: Psystar, fined $5K, files Snow Leopard suit in Florida - http://arst.ch/6yi

NickMoline: RT @thinkgeek: The Supercalafragalisticexpialadocious Four, Peter Pan Parker, Ironmouse, Snow White & the Silver Surfer #frankenmarveldisney

See original: RT @thinkgeek: The Supercalafragalisticexpialadocious Four, Peter Pan Parker, Ironmouse, Snow White & the Silver Surfer #frankenmarveldisney

NickMoline: RT @GoogleCode: SOAP Search API retiring on Sept 7; off to Hawaii. http://bit.ly/xvgbL

See original: RT @GoogleCode: SOAP Search API retiring on Sept 7; off to Hawaii. http://bit.ly/xvgbL

NickMoline: +1 RT @thinkgeek: Will the elevator ever work!? RT @billprady Submit your #bigbangtheory spoiler questions today -- I will answer the dull

See original: +1 RT @thinkgeek: Will the elevator ever work!? RT @billprady Submit your #bigbangtheory spoiler questions today -- I will answer the dull