If you use Linux just do "strings baloonum" on the linux version... Wonder why they need to be able to compose and send mails...

email(
email._parseaddr(
email.base64mime(
email.charset(
email.encoders(
email.errors(
email.feedparser(
email.generator(
email.header(
email.iterators(
email.message(
email.mime(
email.parser(
email.quoprimime(
email.utils(

Also some hints about the algo are hidden there...