Description
The current AWS-SES functionality does not support email attachments.
To send an email with attachments in SES you need to use a RawMessage: http://docs.aws.amazon.com/ses/latest/DeveloperGuide/send-email-raw.html
I am thinking the easiest way of implementing this feature is send a raw email if getIn().getBody() is a javax.mail.Message otherwise do the current processing.
If this seems like a reasonable approach, I would be happy to provide a patch.