Any chance of adding this to ISPConfig's SpamAssassin? http://wiki.apache.org/spamassassin/POPAuthPlugin I am using pop-before-smtp from Debian Sarge. It works by adding Code: loadplugin Mail::SpamAssassin::Plugin::POPAuth popauth_hash_file /var/lib/pop-before-smtp/hosts.db to /home/admispconfig/ispconfig/tools/spamassassin/etc/mail/spamassassin/init.pre and POPAuth.pm to /home/admispconfig/ispconfig/tools/spamassassin/usr/share/perl/5.8.4/Mail/SpamAssassin/Plugin/ Works like a charm (A note on the side: Is it normal that there is both ./usr/lib/perl5/site_perl/5.8.0/Mail/ and ./usr/share/perl/5.8.4/Mail/ containing the same perl modules in /home/admispconfig/ispconfig/tools/spamassassin ??) Actually, my mail relay also contains accounts where mail is delivered to, that is why I am doing this. I am still on the search for a solution for SA to recognize authenticated SMTP connections, since I am both using pop-before-smtp and SASL AUTH. So, this is the first step towards that goal. Recognizing SASL AUTH will however be more complicated, since the Debian Sarge Postfix is not recent enough to enable the sasl_auth_headers and installing a Postfix 2.3 backport did not work in a first attempt... Regards, Marc