Thunderbird Send Later, Schedule Emails

Sometimes you may want to send an email at a later time, maybe because you want someone to receive it a specific time and not earlier, or because you want to avoid mail server overload.
The Thunderbird email client does not offer email scheduling options and it requires manual workarounds to send out emails at a specific time (save as drafts, send when the time has come, or set Thunderbird to offline mode and go online when you want to send out the emails). It does not work all the time as it requires your physical presence.
Enter the Send Later 3 extension for the Thunderbird email client. Send Later does exactly what it is supposed to do: Schedule emails so that they are sent out at a later point in time. Thunderbird still has to be open for that, but you do not need to be present anymore as the emails are sent out automatically by the extension at the selected date and time.
The extension provides you with two options. It can highjack the Send button to display a send later menu on every send, or be used via buttons that need to be placed on one of the available composition toolbars of the email client.
The first option needs to be enabled in the extension's settings. The following menu is then shown whenever the Send button is activated in Thunderbird.
The Send this email later interface may look confusing at first glance. You can specify a time and date, or pick one of the pre-configured options to send the email at a later time. The same menu contains options to send the email multiple times, for instance once per week or year.
A right-click on free space in the Thunderbird write header and the selection of Customize displays the interface element that can be added to the composition toolbar. This is done by dragging and dropping the button set to the toolbar.
Here it is possible to configure a specific date and time for the selected message at which it will be sent.
The options offer various configuration settings, for instance to configure hotkeys or the aforementioned option to highjack the send button in Thunderbird.
New users may want to look at the user guide on the developer's website which explains basic features and advanced concepts like dynamic values for preset buttons or switching between send and send later button based on the weekday.
Send Later 3 is compatible with all versions of the Thunderbird email client from version 2 to the latest builds.






You said that Outlook isn’t your main email client, so which is your main one?
I think its thunderbird
It is Mozilla Thunderbird.
Awesome! This actually solved my problem… what a stupid bug.
If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.
THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!
Solved my issue! 6 years later and this is still problem…
Fantastic. Thank you. Size did the trick.
This solved my Outlook problem, too. Thank you. :)
Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.
You are a god – thank you!
thanks a lot…. work like charm.. :-)
Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers
Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
Thank you
Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)
Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.
I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!
Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007
Great tip! Thanks!
Worked for me, too – thank you!!!
It’s Worked for me, too
thank you very much!
I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!
Thank you so much. Solved!
Considering you published this in 2012, incredible not been debugged by Microsoft.
Thank you again. M
This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.
Thanks.
Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.
Thank you, this worked !!!!
Man, you are a fucking god. Thanks a lot, what an annoying bug!!
Awesome, this post solved the issue. Many thanks!