For a project that I have been assigned to, I need to send emails to a business partner (business_partner.com) from one production server. However, my emails neither reach their destination nor bounce back to me ("reject: MAIL from unknown").
Further analysis by my IT support shows that emails are successfully sent out ("Message accepted for delivery").
The app I coded is not using a public internet email address (e.g. me@hidden_domain_name.com) to send these notifications. Instead, it uses an intranet email address (the server's where my code resides: firstname.lastname@example.org_domain_name.com).
My IT support guys believe it is the cause of the problem.
We created an alias but it made no change. Would adding my public internet email address to "trusted-users" file (we use sendmail) help?
How can I solve this?