Could you please help us to understand the E-mail Command logic?

When an e-mail message is fetched containing @SDP@ in the subject:

STEP 1: SDP checks if the e-mail sender has a login in SDP

                Yes > check the role associated to the user profile and continue to step 2

                No > treat the message as a reqular e-mail (and create a new requester profile if needed)

STEP 2: SDP evaluates the E-mail Command parameters and looks for @@REQUESTEREMAIL=...@@ in the message body

Does REQUESTEREMAIL exist in the REQUESTER database?

                Yes > associate the request to the existing requester profile

                No > create a new requester profile (*)

(*) We are seeing that this step is also executed if the REQUESTEREMAIL already exists in the TECHNICIAN database. Why is that?