A couple times we have had a need to have different email addresses for website Admin From and Admin To. I can't say it was too often. Today, I'd like discuss possible need and options for having the ability to have separate SendTo Admin Email address and other possibilities here like ability to have additional Interfaces as we have in Event Settings (can specify multiple recipients (user, group, address) + To, CC, BCC.
Just to remind you that current Smtp_AdminMailFrom setting is used for both Sending and Receiving ALL General (non-event specific) messages. Keep in mind that in most cases we have specific Email Events when the emails are send out on specific Event which can be configured as needed. The General email address is used as a default one when no specific Event is not there even though there might be several cases where it's used.