Email confirmation log, A feature is needed : to allow us to know what emails is sent.

[Zed T. Dean (WSIProSolutions)]

Trello may send more notification more  than required or not send a notification, mainly beouse  users do not know how to use it ,

we need a feature to show a notifcation log that shows when emails were sent  

[Torben_trello]

This is not a feature we offer. As every user in in control of their own notification settings, we can not share any information about notifications that have been sent, with other users.

I'll still pass your feedback on to our team, that you are interested in a way that verifying that a user was notified.