Reference

pflogsumm(1) on Linux

The text ea4803f33903, as Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.

Produce Postfix MTA logfile summary Copyright (C) 1998-2003 by James S. Seymour, Release 1.1.0.

pflogsumm(1) on Linux now