POP3 is still popular for server-to-server bulk transport. I wrote the service to act as a simple listener where anyone can attach their own handlers to provide

POP3 is still popular for server-to-server bulk transport. I wrote the service to act as a simple listener where anyone can attach their own handlers to provide access to messages. My thinking it would act as a front-end proxy so someone could allow POP3 access to a mailbox by calling through to the REST etc services.