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
Postmen Dec 11, 1998 Leiden, South Holland, Netherlands Uploaded by Hans Keijzers