https://github.com/extremeshok/spamassassin-extremeshok_fromreplyto if you like to add some weight on different from tags... or someone does not have SPF deployed or or or Code: mkdir /etc/mail/spamassassin/plugins/ cd /etc/mail/spamassassin/plugins/ wget https://github.com/extremeshok/spamassassin-extremeshok_fromreplyto/archive/master.zip unzip master.zip cp -pR spamassassin-extremeshok_fromreplyto-master/* ../ rm master.zip spamassassin-extremeshok_fromreplyto-master -R the following should not give any errors: Code: spamassassin -D --lint 2>&1 | grep -i failed have fun adjusting the scores! oh and can someone test this: Code: cd /usr/lib/x86_64-linux-gnu/perl5/5.24/Digest/ cp SHA.pm SHA1.pm // change first line in SHA1.pm from // package Digest::SHA; // to // package Digest::SHA1; to get rid of