Sisimai 5.0.2 has been released! The main changes in this update are the fix for a bug that prevented the original recipient address from being retrieved from bounced emails that were forwarded to Google or another provider, and the resumption of JRuby support in the Ruby version of Sisimai.
Changes specific to the Perl version of Sisimai are indicated by Perl at the beginning of each item, and changes specific to the Ruby version of Sisimai are indicated by Ruby. And then, Sisimai 5 includes many changes that are not compatible with Version 4, so please check the Perl or Ruby version of your environment before installing or upgrading.