We should convert the MIME analyzer to use FAF, allowing other components to reuse it. Specifically, I noted this in the process of bringing back the POP3 analyzer. Ideally, we can just feed the contents of the download emails via the RETR command into a FAF-based MIME analyzer. Then we wouldn't have to rebuild functionality that's close to the SMTP analyzer.
In summary, we should factor the MIME analysis into a separate analysis unit.