I have a system to send a mail to the users who are all using different mail clients like Gmail, Outlook, Rediff etc. But, I am using a From address as constant string (
mrblack) instead of an email format (
Outlook and Rediff cannot receive these emails, while other mail servers are getting them fine.
What do I need to add/change in any header sections in my mail process (without changing from address)? Or is there any configuration in outlook.com to receive an email from a sender without the traditional email format address?