Sisimai 5.0.3 has been released! The main changes in this release are the following updates of Gmail SMTP errors and codes on April 30 and May 10, following SMTP error codes and error messages returned from Exchange Online, and 16 new error message patterns.
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.