Spamd messages

Greets,

everytime a new message arrives, I got this spamd messages:

spamd[2839]: spamd: connection from diocese-portal.algarvedigital.pt [127.0.0.1] at port 35903
spamd: processing message <01c8b837$21cf3980$6025d73e@antithesiss38> for xxxxx@fjt8wn1lkj.pt:111
spamd[2839]: rules: failed to run FORGED_RCVD_HELO test, skipping:
spamd[2839]: (Can’t locate object method “check_for_forged_received_helo” via package “Mail::SpamAssassin::PerMsgStatus” at (eval 944) line 157, <GEN15> line 27.
spamd[2839]: )
spamd[2839]: rules: failed to run MSGID_FROM_MTA_ID test, skipping:
spamd[2839]: (Can’t locate object method “message_id_from_mta” via package “Mail::SpamAssassin::PerMsgStatus” at (eval 944) line 566, <GEN15> line 27.
spamd[2839]: )
spamd[2839]: rules: failed to run UNIQUE_WORDS test, skipping:
spamd[2839]: (Can’t locate object method “check_unique_words” via package “Mail::SpamAssassin::PerMsgStatus” at (eval 947) line 2452, <GEN15> line 27.
spamd[2839]: )

in /var/log/maillog

any clues?

TIA