I hope this isn't too OT for this list, but here goes: I've just copied and hacked the SentOutDB plugin and its associated rule to make a plugin for a private whitelist. The plugin queries a view of my PostgreSQL-based mail archive. This whitelists anybody that mail has been sent to.
The plugin and whitelisting are working reliably but writing the plugin reminded me that my knowledge of Perl is out of date. I learnt it in the latter days of Perl 4, i.e. before the OO extensions, and haven't used it since. I learnt from the O'Reilly Camel book, Programming Perl, which I still have and like. Now I need a refresher, so if anybody can recommend a suitable book I'd be grateful. Would the latest edition of Programming Perl be a good choice? Martin
