Java | JavaMail 1.3.2

JavaMail-1.3-changes

3. Add mail.mime.charset property (4377731)
The "mail.mime.charset" System property (NOTE: *not* Session property) names the default charset to be used by JavaMail. If not set, the standard J2SE "file.encoding" System property is used. This allows applications to specify a default character set for sending messages that's different than the character set used for files stored on the system. This is common on Japanese systems.

この辺りがちょっと気になる。要調査。

APOPにも対応。mail.pop3.apop.enableプロパティを使う。