johnny So, this is 100% coming from my mismapped data import snafu.
Customer a had customer b's email address, we sent customer a with b's email a portal setup, customer b emailed back asking 'new email client who dis' and that was parsed and mapped to the ticket in question.
I'm mobile and can't redact details from screenshots atm, but once I am back in office i'll reply with more details on the specific situation.