Send Later v10.7.3

True "Send Later" functionality to schedule the time for sending an e-mail.

Add-On / Extension for Mozilla Thunderbird (and Betterbird) e-mail client.

This add-on changes the “Send Later” command (Ctrl+Shift+Return) in the message composition window, so that instead of merely copying the message into your Outbox so that it is sent the next time you go online or do “Send Unsent Messages”, a dialog pops up which allows you to specify when the message will be sent.

You can specify a specific time and date, or click “15 mins later”, “30 mins later” or “2 hours later”, or define custom shortcuts. You can also schedule a message to send repeatedly using simple rules (every N hours, days, etc.) or customizable functions.

User Guide