Trash (1080) but no visible emails.

[AC Question]

Galaxy S4 Android 5.0.1. I just emptied the trash folder but it still indicates 1080 unread emails. Nothing is visible when I open the trash folder. The email account is with netzero.net. I only noticed this after I emptied the trash folder. It may have been messed up for quite some time and I never noticed it until it should have been empty.