Hi, thanks for the response,
I didn't trigger it twice, but i always trigger it manually hence i didn't know there was an automatic option. Also is there an option to stop the engine when already triggered.
I've spent whole day debugging it, and i saw that the engine didn't put the mail in the database more than once which leads to other questions. Like where did it go wrong, is it gmail issue, i'm using smtp,gmail host and TLS protocol port 587, never had issues with it.