Stan Hoeppner:
> ????????? ????? 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.
You could use a greylisting implementation that automatically
whitelists clients that pass the test a few times. That is a good
indicator greylisting is not useful for that client. Look for
implementations with auto-whitelist support.
Wietse
