SPF warning?

Have noticed these errors in the log today: warn: spf: lookup failed: Can't locate object method new_from_string via package Mail::SPF::Mech::IP4 at /usr/local/lib/perl5/site_perl/ 5.10.0/Mail/SPF/Record.pm line 225. Googled for: Can't locate object method new_from_string via package

Wondering why this scored a -4.0

http://pastebin.ca/1418492 I guess Harvard got hacked by spammers? -- Secondly, the Earth's a Libra

sa-learn process overhwelming the server

I have one user on my system who receives a LOT of spam. This is intentional as that user is set to never discard email once it is received. I scan the spam and let it auto-expire out of the IMAP folder after 7 days. The trouble is, in those 7 days, the folder usually grows to between