Email Display Name not appearing on Outlook

Hello everyone. I am trying to display my sender display name in this format eg. John Doe <johndoe@gmail.com>, much like the below when i click open the email. As u can see, 'GDS GPLS' is the name, followed by the email wrapped in <...>

 

I have configured in my Process Model as such 

But upon receiving the email, the display name is not shown beside the email. Can anyone help me understand why? I also added 

conf.mailhandler.ntf_sndr_name in my custom.properties file but doesnt work.

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