The OpenSSL Developers have already done this. Look at the smime command for the openssl program at http://www.openssl.org/docs/apps/smime.html#
Also look at http://www.openssl.org/docs/crypto/SMIME_write_PKCS7.html You can sign messages using your private key which allows recipients to verify the message came from you. To encrypt messages the recipient must have a public key. Just sign or encrypt the message then send it like regular mail. See the attached file for a simple example. ----- Original Message ----- From: "Mark H. Wood" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 14, 2003 7:25 AM Subject: RE: introduction > On Thu, 13 Mar 2003, Boyle Owen wrote: > > SSL and mail? Usually, SSL is used to secure the communications between > > a webserver and its clients. I guess you could encrypt SMTP traffic but > > I've never done it (no doubt someone else will comment on this). > > The SMTP verb is STARTTLS. See RFC 3207. Something like this is also > defined for POP, IMAP, ACAP, and some others. > > I've been toying with the idea of inventing a new UUCP protocol to provide > authentication and secure transport using TLS (but there's no code yet). > There are lots of uses for something like TLS, beyond web stuff, and > probably many more yet to be discovered. > > -- > Mark H. Wood, Lead System Programmer [EMAIL PROTECTED] > MS Windows *is* user-friendly, but only for certain values of "user". > > ______________________________________________________________________ > OpenSSL Project http://www.openssl.org > User Support Mailing List [EMAIL PROTECTED] > Automated List Manager [EMAIL PROTECTED]
Mail.cpp
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