How to add email Reminder Action to Lightning event?

In Thunderbird Lightning, when creating or editing a calendar event, how do we add an email alert? My Lightning offers only Display alert / Afficher une alerte. I need a Reminder Action able to Send an Email Message.

The number 1 in this screenshot shows the location of this challenge.

Below is the same question as above. But with details if you’re interested in those.

By “email alert” I mean, for example, 1 hour before an event, an email message reminder is automatically sent to a set email address.

What I tried that did not work:

  • Clicked on the Choose a Reminder Action/Choisir une action de rappel drop down menu. Only one option is available. It reads Display alert / Afficher une alerte.
  • Double-checked that the calendar is a Network Calendar (CalDAV)
  • Double-checked that the calendar Properties as an email address associated to it
  • Searched for add-on about email alert at I found none able to do email alert.

Synonyms of calendar email alert:

  • alarm mailing
  • reminder action
  • send email reminder
  • thunderbird notification by email message

Did you try adding yourself in the attendees? I click the attendees tab then add yourself again, you will now be an attendee as being invited then you will get alerts by email. That’s the only way I figured our how to do it. Sorry for the way late reply.

Thanks for your reply @Earthealthy_GIS :slight_smile: Appreciated. Yes. This is one of the first thing I tried. But it failed. Because adding myself in the Attendees only send email notifications after a new Event is created or on Event change(s). This is useful. But this is not what I need.

What I need is this, when creating or editing a Lightning Calendar Event, to somehow being able to automatically send email reminder(s) before an event starts. For example, but not limited to, 1 hour before.

Maybe my question and the steps above were not clear. To clarify my question, I created this new question and new screenshots at

According to Wayne, this Discourse is no longer actively monitored for Thunderbird support, discussion and suggestions. Source at

For those interested in this question about automated email notification, I suggest that we resume discussion at