The POP3 filter API provides services for accessing POP3 messages processed by the WinGate POP3 proxy. Not only can you access and modify POP3 protocol conversation, you can also send new POP3 commands and data along the filter chain.

Message Filtering

You register a POP3 filter with a call to POP3FilterRegisterFilter. In this call you provide a POP3FilterProviderInterface for the framework to call you on to process commands, responses, data and manage lifetime management of your filter.

Sending Messages

The API also provides functions for sending POP3 responses and data via POP3FilterSendResponse and POP3FilterSendMessageData. You can also send POP3 commands by setting POP3 context and calling POP3FilterProcessCommand