Instead of having to manually make changes we currently have a script that uses our mail servers api and builds us a list of all mail domains and their domain aliases.

Currently changing our scripts from text based to SQL based, but I intend to do the same thing with SFE. As customers come and go won't have to worry about having to manualy make changes.

I believe you have a multi mailserver setup and it should be fairly easy to do something similar as long as your making SQL updates.

Same thing with the AuthorizedTo list. Will be built/managed dynamically every hour using our mail server api and scripts I wrote. No hassles with customers updating email accounts.