Неворотин Вадим put forth on 10/27/2010 10:51 AM: > I can't add clients to whitelist because I don't know their addresses. One > of our manager call to client with phone and say him email address. And in > this case manager should receive a letter without greylisting, so in fact I > need some method to pass greylisting, which manager could describe to > client. The simplest way for manager and client is to add to mail subject > some digital code, but I can't understand how to configure Postfix to > support this method.
Will all these clients be sending to the same email address @yourcompany.tld upon this initial contact? If so, simply whitelist the recipient address. There are many ways to skin this cat. The key is that any anti-spam measures should always be 100% transparent to senders. I.e. they shouldn't have to add something to the subject line just to get their email through your server, or jump through any other hoops. I use Postgrey here, and the most I've ever had to wait on greylist delay after signing up for a new mailing list or placing an order with a new company was a few minutes. If you can't whitelist in one form or another, and a few minutes delay is too long for you, then you shouldn't be using greylisting at all, as it's not a good fit for your needs. -- Stan > 2010/10/27 Stan Hoeppner <s...@hardwarefreak.com> > >> >> 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 >> >
