It can take some time, e-mails come first.

Thanks... I'll keep watch on the portal for it.

That can happen Mozilla Monitor doesn’t always list every breach immediately or at all, since it depends on publicly verified datasets. A notice from Pitney Bowes could be from a smaller or more recent incident that hasn’t been indexed yet, or it might be limited in scope. It’s best to treat the notice as legitimate: change any related passwords, watch for suspicious activity, and verify the message directly through Pitney Bowes’ official channels rather than relying only on breach aggregators.