How to Correct an Email in Gmail

Gmail is Google's free web-based email system. According to Google, Gmail is built on the premise that email should be more intuitive and useful. And in accordance with Google’s user-friendly spirit, Gmail is becoming even more valuable. New Gmail features are gaining kudos from Gmail users everywhere; the now famous ‘forgotten attachment detector' as well as the ‘undo send’ option.

Most of us have carefully composed an email and proudly sent it only to realize we’ve neglected to include the attachment or worse, we’ve selected ‘reply all’ when the email was intended for a specific individual. So if you hurriedly hit ‘send’ on your email sooner than should have, Gmail offers you an opportunity to cancel sending and edit your message before sending again.
1
Establish a Gmail account:
If you do not already have one, go to Google's Gmail site and follow the instructions to set up your free Gmail account.

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  Step 2
  Log into Gmail:
  Log into your account and click on 'settings' at the top right corner of your screen. Next, click on the 'labs' tab. Scroll down until you find the 'forgotten attachment detector' and the 'undo send' options. Choose to 'enable' these Gmail options and then select 'save changes.'
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  Step 3
  Rethink your email:
  If you send an email that Gmail detects should have an attachment - yet you've forgotten to do so - Gmail will pop up a window asking if you intend to send the message without an attached file. This Gmail feature allows the opportunity to send the email as is or attach a file.
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  Step 4
  Edit your email:
  If you send a message with Gmail that you need to change, simply click the 'undo' option at the top of your inbox. If you are within the grace period, the email will halt and an editable draft will appear. Make your changes and resend your email.