Update spamassassin to 3.4.1.
Changes:
* improved automation to help combat spammers that are abusing new top level
domains;
* tweaks to the SPF support to block more spoofed emails;
* increased character set normalization to make rules easier to develop and
stop spammers from using alternate character sets to bypass tests;
* continued refinement to the native IPv6 support; and
* improved Bayesian classification with better debugging and attachment
hashing.
Full ChangeLog at https://metacpan.org/changes/distribution/Mail-SpamAssassin
The japanese/spamassassin port is broken until it's updated for 3.4.1.