I have a special email address on our system that auto forwards (using delivery options) to a vendor site. It works great for internal staff because we are all users on the vendor system. But if the original email comes from an external person, the email never gets to the vendor system because those external people are not users on that vendor system. We can't add external users to the vendor system due to the number of licenses. Plus we could potentially get an email from 100,000+ external emails so it would be impossible to put them on the vendor system even if we had the licenses.
Using the tracking log I can see that the emails coming in from external users are automatically forwarded under that external user's email address. Is there a way to have those auto forward using an internal email address instead? That would resolve all of my issues if the email came from an internal email box.