outlook not receiving mails from laravel hosted website

i have implemented a mailing system in Laravel which send mails to the users when tried from localhost it is sending mails to both gmail and outlook but when i moved the code to production it only gmail accounts are receiving the mails my env file contents are :

MAIL_DRIVER="smtp" 
MAIL_HOST="smtp.gmail.com" 
MAIL_PORT="587"
MAIL_ENCRYPTION="tls" 

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