Boomerang for Gmail lets you set a time to send or receive

Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages. It works for Gmail accounts and Google Apps / Hosted Gmail email accounts.

1. Write a new message or edit a draft you already wrote.
2. Click Boomerang’s “Send Later” button.

3. Choose what time you want the message to be sent.
4. Boomerang will automatically send the message at that time, using Gmail’s servers.
5. Since we send as you, through Gmail, you don’t have to worry about weird headers or deliverability issues. It’s just like you logged in and sent it yourself!

Boomerang for Gmail