The peers plugin by Charlie Brady permits different plugins for connecting clients. It's used in thousand of sme server installations since he presented it to the list: http://www.nntp.perl.org/group/perl.qpsmtpd/2006/02/msg4475.html
Here is the patch actually needed to the core: http://github.com/filippocarletti/qpsmtpd/blob/0c8c3fbd4a79d4ef3536ff90e3bb1595bbad0fe9/packaging/rpm/files/qpsmtpd-0.83-peer_hooks.patch Is there any possibility to include peers in the core? Or find a way to cleanly add needed patch to the core? -- Ciao, Filippo