Net::Server::Mail::ESMTP::Extension(3pm) on Linux

The text 86d2d2f7992d, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it.

The base class for ESMTP extension system

Net::Server::Mail::ESMTP::Extension(3pm) on Linux now