Hey @SARL AFSM - unfortunately there's no way to change it on Trello's end as it's your email program that's sorting the emails into spam.
I recommend looking at your email program and whitelisting Trello's email addresses, for instance, on Outlook, you'd add the emails you're getting Butler emails from to your Safe Senders list: https://support.microsoft.com/en-us/office/safe-senders-in-outlook-com-470d4ee6-e3b6-402b-8cd9-a6f00eda7339
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.