Good day! I totally get how annoying that "screen new sender" thing can be on your Samsung S25+. It's certainly understandable how this function can disrupt your email management workflow.
Right now, the feature is built into Outlook’s filtering system and can’t be fully turned off, but you can work around it so messages go straight to Junk:
Open the message > tap the three dots (…) > select Move to Junk.
From the Junk folder, tap the message again > choose Block sender.
You can also add the address to Blocked Senders in Settings > Mail > Junk email.
Once you do this, Outlook should start routing similar emails directly to your Junk folder without showing the “Screen new sender” prompt.
Would you like me to also guide you on adjusting your focused inbox and filtering rules? These can help reduce inbox clutter even further.
I hope this helps streamline your email experience. Please let me know if the steps work for you, or if you’d like me to walk you through a specific setting on your Samsung S25+.