My company is migrating our mail servers from on-prem into the cloud. While we're in transition, e-mails from the accounts in the cloud are showing with a different SMTP address to mailboxes still on-prem.
The primary SMTP hasn't changed, so e-mails from IMG sent to firstname.lastname@example.org are being received, but the responses aren't showing as coming from the same address, so IMG isn't recognizing the user's replies and e-mail approvals aren't being processed.
I know I can create a custom attribute for a secondary e-mail, but is there a way to add that attribute to be recognized in the approval workflow or in the Admin - Email section? We would need the system to be able to recognize both formats while our company is in transition.