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One of our customers has said they need to be able to send us emails using a PGP security protocol which I know nothing about. They have said it will be just one email address which they want to send to at our end, which we will then need to send to a group of members.<br />
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What is PGP? How do we implement this and are there any cost implications?
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One of our customers has said they need to be able to send us emails using a PGP security protocol which I know nothing about. They have said it will be just one email address which they want to send to at our end, which we will then need to send to a group of members.

What is PGP? How do we implement this and are there any cost implications?

PGP Security with Exchange 2003

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.