Previously, an add-on called Blunder Delay allowed emails to be auto-sent from the outbox every x minutes. I frequently use the shortcut CTRL+SHIFT+Enter to quickly move emails to the outbox, bypassing the usual 2-3 second delay when clicking send (a lot longer if attachments are included). This slight delay adds up significantly when managing hundreds of emails daily.
I manually send unsent messages every 15 minutes by right-clicking the outbox and selecting 'Send Unsent Messages'. It would be incredibly helpful to have an option within Thunderbird to automatically send these unsent messages at regular intervals, such as every 5 minutes.
This feature would save time and streamline email sending for many users like myself. Thank you for considering this suggestion, and I appreciate all the hard work that goes into making Thunderbird such a fantastic email client.