Greylisting for Your Email
A friend of mine recently turned me onto a service called greylisting for my mailserver. His comments are great, so I’ve just pasted them below. Thanks to the guys at GreatDaneHosting!
Keeton,
You need to look into greylisting for your email. The first time you get an email from a specific email address, the mail server tells the remote mail server to resend in 30 minutes. Most spam servers don’t bother. Once the email has successfully been resent to your mailserver, it goes on a whitelist, so future emails are not delayed.
If you can handle the delay in email, which most people can, then it is a very effective way to cut down spam. You can manually add email addresses to your whitelist, so they won’t be delayed the first time.
Mike