There are multiple artists that perform under the name Postmen:
These are photos from concerts where Postmen played, so they may be of other bands that played the concert as well.
Pinkpop Festival 2000 Jun 10 - 12, 2000 Landgraaf, Limburg, Netherlands Uploaded by Mariska Den Breejen
Postmen Feb 22, 2000 Leiden, South Holland, Netherlands Uploaded by Hans Keijzers