What is the best way to send one-time email on record update

[dc006]

Iam new to Fabric and first would like to thank you for great Joomla application.

I would like to send an email to user on record update, however this email should be sent only once. In other words I dont want to send email every time I update the form.

The element to watch is yesno plugin, and I want to send an email to user when this element value is == 1
The email should be sent either on New or Edit record

What is the best approach to achieve this?

 

[troester]

Add php code in "Condition" of the email form plugin, something like
return '{your-watch-element_raw}' == '1';