I've implemented a solution to parse Email Files (.eml) into objects using Mime4J. The process parses an email file, create an object and write a new file to disk.
I was wondering if is possible to send the MimeMessage of Mime4J through Transport.send(mimeMessage) instead to create a new file.
The simplest approach would be to use the Mime4J Message.writeTo method to write the message to a ByteArrayOutputStream, then wrap the byte array with a ByteArrayInputStream and use that to construct a JavaMail MimeMessage object.
A more complex but more efficient approach would be to create a class that subclasses MimeMessage and delegates most of the methods to the corresponding methods on the Mime4J Message object.