There are some strategies for this.
The approach I use is to have a single "shared" exchange email account for all companies and depts that is password shared. This is for authentication and activating the email engine only. Not what customers or vendors see.
Example : GPShared@ATT.com
Then each GP Email Message gets assigned a unique email which is per company and often per department.
See the REMIT message follows. This is the email the Vendor will see in the Remittance email. It can be a donotreply or a dept email if you want replies encouraged.
The example I show is a donotreply account:
Then on every EFT Vendor REMIT Address where you set up the Email that the REMIT message will go to, we always add a BCC: here that comes back to the department. See screenshot follows:
Now with this approach you are using a single email account for everyone in all companies to share but each Company is using their own E Mail Messages Reply To fields which controls what their vendors, customers etc. will see. Then by using a BCC on all addresses we can also easily find "sent" emails if in fact the vendor says they didn't get it and we can resend it from the company or dept email account rather than GP.
Hope this helps.
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