The OpaqueMail Proxy is an SMTP proxy and message transfer agent (MTA) to add or remove S/MIME message signing, encryption, and authentication for outbound messages. It can operate in passthrough mode or augment messages to add or filter headers.It also serves as a passthrough IMAP and POP3 proxy to import S/MIME certificates, filter IPs, or …

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1. About OpaqueMail is a free .NET e-mail library with full support for IMAP, POP3, and SMTP. It provides S/MIME message signing, encryption, and decryption to foster better e-mail security and privacy. The library follows IETF standards, implementing all IMAP4rev1, POP3, SMTP, and S/MIME 3.2 commands plus common extensions such as IDLE. It supports MIME, …

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OpaqueMail is a free .NET e-mail library with full support for IMAP, POP3, and SMTP. It provides S/MIME message signing, encryption, and decryption to foster better e-mail security and privacy. The library follows IETF standards, implementing all IMAP4rev1, POP3, SMTP, and S/MIME 3.2 commands plus common extensions such as IDLE. It supports MIME, Unicode, and …

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