POP is a bit more challenging:

• The only reliable crate out there is pop3-codec, but work is still in progress.
• When reading a message, it is removed from the server. Which means the actual sync does not work. The server should not be the source of trust.

#pop-lib

• Set up connection and session management (async, rustls).
• Implement high level functions based on commands (auth, list, apop etc).
• Redact in-code docs.
• Redact other docs (README, CHANGELOG) and release a v0.1.0.

#email-lib

• Implement all available features.
• Add cargo feature, update docs.
• Update CLI configuration to accept POP.