Lravel 5.6 : emails sent using mail facade go to junk for only hotmail and outlook addresses

i'm setting up automatic emails for events like user registration and change password etc. the problem is that the emails go to junk for Hotmail,outlook whereas work fine for gmail.

I have tested my email for junk content and https://www.mail-tester.com/ gave me a score of 8.5/10 and i don't want to ask my recipients to manually add me to safe senders list

via Chebli Mohamed