Rated 5 out of 5 stars

I use the Send Later feature in combination with BlunderDelay and MagicSLR (now "Get/Send-Button (minimized MagicSLR)") to make message sending run in the background with the compose window closed. "Get/Send-Button (minimized MagicSLR)" seems to have lost its Send Later button, as that button vanished from Thunderbird recently.

This add-on replaces that add-on perfectly for the sole purpose for which I originally installed it (that other add-on seems to do something else now). Send Later Button does the single thing I wanted, and with the same icon, too!

This review is for a previous version of the add-on (1.1).