sudo apt install spamassassin
## Checking Syntax Errors spamassassin --lint
See Procmail for enabling SpamAssassin
/usr/bin/sa-learn --spam ~/Maildir/.Spam/cur /usr/bin/sa-learn --ham ~/Maildir/cur
ls -all ~/.spamassassin
Apache SpamAssassin https://spamassassin.apache.org/
https://emaillab.jp/spamassassin/ http://www.miloweb.net/spamassassin.html https://www.hogepiyo.com/wiki/doku.php?id=linux:ubuntu:spamassassin https://emaillab.jp/docs/spamassassin/SpamAssassin-plugin-OSC-20061028.pdf