| Class | StringTransportWithConnectionLosing | Undocumented |
| Function | setUp | Undocumented |
| Function | strip | Undocumented |
| Class | POP3ClientLoginTests | No class docstring; 1/13 methods documented |
| Class | ListConsumer | Undocumented |
| Class | MessageConsumer | Undocumented |
| Class | POP3ClientListTests | Undocumented |
| Class | POP3ClientMessageTests | No class docstring; 1/8 methods documented |
| Class | POP3ClientMiscTests | Undocumented |
| Class | SimpleClient | Undocumented |
| Class | POP3HelperMixin | Undocumented |
| Class | TLSServerFactory | Undocumented |
| Class | POP3TLSTests | Tests for POP3Client's support for TLS connections. |
| Class | POP3TimeoutTests | Undocumented |
| Class | POP3ClientModuleStructureTests | Miscellaneous tests more to do with module/package structure than anything to do with the POP3 client. |