Phantom Users

[DickD59]

I have an e mail address that keeps coming back as a "postmaster@outlook" message of nondelivery AND I cannot find it anywhere in my Constant Contact

[William_A]

Hello @DickD59 ,

That's a generic email address used by Outlook for notifying you of an undeliverable bounce. Other email programs are also known to utilize similar "postmaster@" addresses for their automated bounce notification emails. The true contact's address might be included in the email you receive from "postmaster@," but otherwise this is simply referencing one of your contacts that's regularly bouncing, as shown in your emails' reporting.