Неворотин Вадим put forth on 10/27/2010 4:47 AM: > I have greylisting on my server, but sometimes I need to allow some external > users to send mail to my server without greylisting. I can't add them to > whitelist, because in most cases it's a new clients, so the good idea is to > ask them to add to mail's subject some code and to accept letters with this > code in subject without greylisting. But I can't understand how to implement > this simple idea in postfix. I need to move greylisting from SMTP headers > check to mail's body check and start greylisting only if Subject: mail > header doesn't match a regexp. How can I do it?
Greylisting has but one purpose: stopping spam bots (zombies) Are these new clients sending emails to you from zombies? No, of course not. So simply whitelist their addresses or IPs in your greylist daemon setup (not in Postfix). This is trivial to do with Postgrey, though I don't know about other daemons. Whitelisting in your greylist software is not the same as whitelisting in Postfix. It only allows clients to bypass the greylisting step. Any real MTA will retry, so if you _know_ it's a real MTA, which in this case you do, whitelist it in your greylist config. -- Stan
