Reply #30: I work in the email industry... DomainKeys are NOT for spying... good god

[ReverendDeuce]

DomainKeys are a powerful new anti-spam tool that Yahoo has designed. Here is how it works...

Each messages is "signed" by a private key. The public key for the sending domain is published in the sending domain's DNS as a TXT record. When your ISP's mail server gets the message, it looks in the sender's DNS for the public key. If the public key can authenticate the signature of the email with the public key, it's valid. If the signature cannot be verified, it's considered a spoof/spam -- as the spammer would need to have the private key in order to authenticate.

This hash is just that -- a hash. It's not encrypted data that includes your passwords.

Good heavens, people...