I am running spamassassin-3.2.5-1.el5 on 64 bit CentOS. sa-update -D seems to indicate that the DKIM libraries are installed.
May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: Digest::SHA1, version 2.11 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: HTML::Parser, version 3.55 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: Net::DNS, version 0.59 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: NetAddr::IP, version 4.043 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: Time::HiRes, version 1.9717 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: Archive::Tar, version 1.76 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: IO::Zlib, version 1.04 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: Digest::SHA1, version 2.11 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: MIME::Base64, version 3.07 May 18 10:25:02.682 [15134] dbg: diag: [...] module installed: DB_File, version 1.814 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Net::SMTP, version 2.29 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Mail::SPF, version v2.007 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: IP::Country::Fast, version 604.001 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Razor2::Client::Agent, version 2.83 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Net::Ident, version 1.23 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: IO::Socket::INET6, version 2.67 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: IO::Socket::SSL, version 1.39 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Compress::Zlib, version 2.033 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Mail::DKIM, version 0.39 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: DBI, version 1.616 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Getopt::Long, version 2.35 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: LWP::UserAgent, version 6.02 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: HTTP::Date, version 6.00 May 18 10:25:02.683 [15134] dbg: diag: [...] module installed: Encode::Detect, version 1.01 Looking at the X-Spam-Report on various messages and I never see that its looked at. I see that SPF is checked and scored. Any idea why its not checking the DKIM signatures?