> To be fair, you can do this in java by adding to Header and MIMEHeader "implements emailHeader". Not if you aren't the author of the package. (You could modi

> To be fair, you can do this in java by adding to Header and MIMEHeader "implements emailHeader". Not if you aren't the author of the package. (You could modify your local copy, but requiring a fork is always a pain.) Without the ability to modify the sources, you would have to create custom subclasses of Header and MimeHeader which implement that interface, and find some way to make the library generate your custom subclasses instead of the defaults.