Gmail offers 'undo' email option
Stupid POP tricks
Customer Success Testimonial: Recovery is Everything
The folks at Gmail Labs obviously dedicate a healthy amount of brainpower to the prevention of regrettable emails sent through their service.

Custodial hearts at Google who've brought us Mail Goggles to stave off late-night drunken e-correspondence have now introduced an Undo Send option to their web-based email lineup.
Gmail's User Experience Designer Michael Leggett illustrates the team's M.O.:
"Sometimes I regret sending a message the morning after. Other times I send a message and then immediately notice a mistake. I forget to attach a file or email the birthday girl that I can't make her surprise party. I rush to close my browser or unplug the Internet - but Gmail almost always wins that race."
Enabling the Undo Send option gives the user a scant five seconds to let wiser heads prevail. The catch is that Undo Send doesn't kill an email that's already been sent, but instead just holds the message while the five-sec clock ticks down.
To this reporter, that doesn't sound like enough time to dismiss an ill-sent email - but Leggett claims that even just five seconds does the trick for him and already has saved him several times.
Undo Send was developed by Yuzo Fujishima, a Google engineer in the company's Tokyo office.
Gmail users can switch on Undo Send in Gmail Labs under settings. The rest is pretty easy - if you're quick:
1) Click 'enable' on GMail Labs tab in settings.

2) Author regrettable email message.

3) Realize you've made a big mistake within five seconds.

4) OH %&@# OH %&@# OH %&@# ...phew!

5) Atone for your wicked, wicked ways.

Follow this link to enable Gmail's five-second grace period. ®
COMMENTS
@theotherone
akin to wanking an elephant with a pair of tweasers
Wow, learned something new today...i didn't even know that was possible.
Anyway, that's MR. to you.
@Geoff Johnson: Hopefully they'll do attachment warning next.
"Scan the mail for attach, attached, enclosed or other such words and warn you if you didn't add an attachment. That'd save plenty of embarrassment."
I have this already for Outklook - see http://manage-this.com/handy-outlook-attachment-reminder-macro/
Also warns you before sending a meeting request with no location or a message with a blank subject line.
@A/C #1 "Ahem..."
But you wont find that pause rule accessible in Outlook Web Access will you?
Kind of the whole point of Gmail is to be accessible from just about anywhere like OWA is.
.
Mind you I'm not sure if you can set up the rule in 'full-fat' outlook and it will be done in OWA too?

IT infrastructure monitoring strategies
Requirements Checklist for Choosing a Cloud Backup and Recovery Service Provider
Data control in the cloud
Cloud based data management
Enabling efficient data center monitoring