Send Later Extension [SL8TR]

I use Mozilla Thunderbird. I have been using it for a few years now and I swear by it. I evangelize it to anyone and everyone. And I have my gripes.

Whenever I see something that doesn’t quite match my expectation, I have promised myself, “One of these days I am going to write an extension to solve that problem”. That day is finally here. I have had a major gripe about the “Send Later” function of Thunderbird, innocently enough, I thought it would “Send the email Later”, when I wanted it to… But as many Thunderbird users will realize that is being naive…

So I wrote this extension that extends the Send Later functionality by bringing up a scheduler for the time when the “Send Later” option is chosen (Ctrl+Shift+Enter is the shortcut). The extension saves the message to draft and monitors the messages in the draft folder, when the chosen time arrives it moves the message to unsent and sends unsent messages. From the limited testing I have been able to do, it works. I am going to submit it to Mozilla Dev Center and hope they approve it. Meanwhile it is available here for downloads and updates. You may try it at your own risk, I will try my best to support any user.

Send Later Icon Send Later Extension 1.2.0.0
You can download the extension from http://downloads.unsignedbyte.com/sl8tr/sl8tr.xpi. You will need to save it your hard disk and then install it from Thunderbird Extension Manager.

This update fixes many problems experienced by some users as well as adding some brand new features
Instructions for installing:

  1. Right click on the link and choose “Save Link As…” or “Save Target As…”.
  2. Choose a file path on your hard disk. [Desktop/Home folder is fine too].
  3. In Thunderbird, goto Tools -> Extensions or Tools -> Add ons.
  4. Choose Install, locate the the SL8TR.XPI file you saved in step 2.
  5. Restart Thunderbird.

Usage Instructions:

  1. There are many new options, mostly self explanatory, please read the update post on the new features.
  2. The background polling status is shown the status bar as “SL8TR [IDLE]“, if there are messages in the draft folder waiting to be sent later the message reads “SL8TR [PEND 3]” (for e.g.).
  3. If you want to schedule a message to send later, just choose “File->Send Later” (or CTRL+SHIFT+ENTER) after composing an email.
  4. This will prompt you with the time and date in a popup window, select the time and date and Click on “Send at specified time”.
  5. You may also click one of the quick access buttons to use a predefined value like 15 mins later [or use ALT+1 or ALT+2 or ALT+3].
  6. If you want to use the default Thunderbird Send Later functionality you can choose “Passthrough to Send Later”.

Here is a preview of the extension running under Thunderbird 2.0.0.19 on Windows Vista

Send Later 1.2.0.0 Prompt Screenshot

Send Later 1.2.0.0 Prompt Screenshot

And that’s it !!!
For any comments and discussion please visit these posts :

Note: If you are having some problems with version 1.0.0 or 1.0.2 or 1.1.5 PLEASE update to version 1.2.0.0 which fixes many issues

31 Comments

[...] were a couple of minor issues with the Send Later extension which was brought to my attention. These items are now [...]

[...] Send Later, and thats because of incomplete installation instructions on my behalf The original page is now updated to include the following [...]

SoftSaurusApril 21st, 2007 at 12:28

[...] If you’re keen on sending emails with Thunderbird’s Ctrl-Enter shortcut, then incorporating the Send Later command should be a cinch - just hit Ctrl-Shift-Enter. You’ll see the Send this email later dialog, which lets you set the exact minute you’d like the email sent (keep in mind Thunderbird will need to be open at that time). If this seems familiar, it’s because it performs the same task advertised by previously mentioned Send Tools, but some readers had trouble getting SendTools to work reliably, and it’s not supported in Thunderbird 2.0. Send Later, on the other hand, is 2.0-ready. It’s also free, works wherever Thunderbird does. — Adam Pash Send Later Thunderbird Extension [...]

[...] Vía: Difunde Firefox Enlace: Descargar Send Later [...]

[...] atvejams, kai darbą padarai greitai, bet nori apsimesti, kad labai prie jo vargai. Parsisiųskite Thunderbird priedą Send Later ir apgaudinėkite į sveikatą. [...]

[...] Send Later Thunderbird Extension [...]

Daves Blog » download of the dayApril 24th, 2007 at 00:20

[...] “Send Later” für Thunderbird. Man kann eine Mail verfassen, und dann den Zeitpunkt einstellen, an dem sie versendet werden soll. Manchmal ganz nützlich, Thunderbird muss zum gewünschten Zeitpunkt natürlich an sein. Gefunden auf lifehacker.com [...]

[...] The Unsigned Byte » Send Later Extension [SL8TR] [...]

[...] Send Later - integrates extra ‘Send Later At’ (’Ctrl+Shift+Return’) feature to the [...]

[...] Nostalgy, con la que puedes asignar atajos de teclado a tareas rutinarias (a lo Mail Act-On) o Send Later, que te permite posponer el envío de un mensaje a una fecha y hora determinada (muy [...]

[...] Later Un’altra utile estensione per Thunderbird potrebbe essere Send Later che permette di schedulare in che giorno e a che ora inviare una mail, in modo da poter spedire [...]

[...] Send Later - Presionando Ctrl-Shift-Enter, podremos enviar los mensajes “luego”, no instantáneamente, como es el [...]

[...] the opening & ending to different groups of recipients. The last add-on I installed is Send Later, which allows you to send the email at specific time and date as long as Thunderbird is running. [...]

[...] Send Email 24/7 with the Send Later Extension for Mozilla Thunderbird extends the Send Later functionality by bringing up a scheduler for the time when the “Send Later” option is chosen (Ctrl+Shift+Enter is the shortcut). The extension saves the message to draft and monitors the messages in the draft folder, when the ch (tags: mozilla thunderbird extension plugin email) [...]

[...] The entire thing comes as an addon for Thunderbird and can be found here. [...]

[...] Thunderbird loaded the extension fine, but he forgot to snap it inside a different partition. Send Later Extension [SL8TR] [The Unsigned [...]

[...] emails programados para que se envíen automáticamente más tarde, pues agregarle la extensión Send Later, también conocida como SL8R. Con esta aplicación podrás enviar los correos en 3 opciones de [...]

Send Later Extension - DevsolMarch 12th, 2009 at 21:05

[...] Gå till mer information om Send Later Extension hos the Unsigned Byte [...]

[...] programados para que se envíen automáticamente más tarde, entonces la extensión que buscas es Send Later, también conocida como [...]

[...] Thunderbird loaded the extension fine, but he forgot to snap it inside a different partition. Send Later Extension [SL8TR] [The Unsigned [...]

[...] funcionalidades. Pues he descubierto una muy útil para quienes necesitamos el don de la ubiquidad. Send Later nos permite enviar varios correos 15 minutos, 30 o 2 horas después mientras nosotros podemos estar [...]

[...] be found here. There are some really nice add-ons for Thunderbird, such as Mac Growl support, SendLater, Lightning for integrated Calendar, Skype toolbar add-on, Dictionary Search, and much more. If you [...]

[...] More: Send Later extension for Thunderbird [...]

[...] The Unsigned Byte » Send Later ExtensionExtensión para el envío diferido de mails (Mozilla Thunderbird). [...]

[...] Send Later - 在邮件编辑框上嵌一个 ‘Send Later At’ (快捷方式: Ctrl+Shift+Enter [...]

[...] 4. Pošiljanje elektronske pošte z zamikom. Elektronska pošta, ki jo pišeš čez dan, vkolikor se ne mudi tudi komu drugemu in ne le tebi, naj se pošilja ob nemogočih nočnih urah. Bonus točke za pošiljanje v noči na ponedeljek ob 3 zjutraj. (Outlook, Thunderbird) [...]

Mozilla ThunderbirdApril 24th, 2009 at 04:18

[...] Re: Mozilla Thunderbird Try the Send Later add-on [...]

[...] Send Later: This extension modifies the “Send Later” option in your file menu so you can specify a time and date for your email to be sent. Otherwise, your email will just sit in your Unsent email box forever. [...]

[...] Send Later - integrates extra ‘Send Later At’ (’Ctrl+Shift+Return’) feature to the message compose window, allowing you to send messages on a particular future date and time. It can be a contract cancellation notice, a ‘Happy Birthday’ or a friendly ‘Don’t Forget’ note. (Thunderbird: 1.5 – 2.0) [...]

[...] you are using Thunderbird, then use this Send Later plugin:  http://www.unsignedbyte.com/?page_id=4 (different than the one for [...]