Microsoft Corp. said it would release a public beta of Exchange Server 2010 on Wednesday, and said the final version of its flagship communications software would be released by year's end.
Improvements to Exchange Server 2007's successor include a built-in e-mail archive and other features for e-mail administrators, as well as innovations aimed at end users that either match Google Inc.'s Gmail or, in some cases, top it.
One thing that will not change: Exchange 2010 will continue to use the Jet database engine to store messages, instead of SQL Server as Microsoft publicly outlined earlier this decade.
Jet has been criticized for not scaling well for companies with many e-mail users or large in-boxes.
Julia White, director of Exchange product management, said that Microsoft had "done a ton of innovation" on Jet for Exchange 2010. "We're optimizing what we've done with Jet to move it to the next level." However, White was unsure if Jet would be used for later versions of Exchange.
Taming the in-box
One new feature Microsoft touts as unique is Ignore Conversation, which allows users to mute e-mail threads to which the user, because of Reply All or Bcc inclusion, is not interested in following.
Another new feature is called MailTips. It warns users before they send an e-mail if a particular recipient is out of the office and unavailable. Or it will warn a user if he is about to send an e-mail to a distribution group that is very large or includes recipients external to the company, which White said could prevent the inadvertent leaking of sensitive company information.
MailTips has the same goal as two recent add-on features in Google's Gmail: MailGoggles, which requires users to do a difficult math problem before sending an e-mail at user-defined hours to prevent post-sending regret, and Undo Send, which holds e-mails for five seconds before sending them.