You could save email as template so you can reuse it. then set up an event which can remind you to send an email.

Or create a template and with 'Send Later' The addon extension 'Send Later' facilates scheduling an email which you use as 'Send Later' rather than as 'Send' https://addons.mozilla.org/en-US/thunderbird/addon/send-later-3/

Thanks, Toad Hall - I've been using Thunderbird for years and never noticed the Template option before!!

I just tried the Send Later command as a test by sending it to myself.

I was expecting an option to come up whereby I could set a time - but the email just disappeared from my screen as it normally would with a Send Now.

It's not in my in-box and it's not in Drafts - how do I find it and how do I manage the timing of the message?

OOPS! Sorry, Toad Hall, I didn't note the bit about the extension - I'll download that.

But there is a "Send Later" option under the File Menu, which is what I used - do you know how to manage that?

The 'Send Later' button just puts emails into the 'Outbox' folder located under 'Local Folders' . You send items in that folder by right clickon Outbox and use 'Send unsent messages' option.

the 'Send Later' addon will offer additional options when you select 'SEnd Later' to set times.

Thanks, Toad-Hall.