From: Anders (mailflac.kalibalik.dk)
Date: Tue May 27 2008 - 02:58:11 CDT

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mouss wrote:

> Anders wrote:

>> We are currently running SQLgrey with good results, but sometimes
>> delayed mails can be an annoyance.
>
> do not greylist all mail. greylisting should be done selectively. also,
> a client that successfully retries should be whitelisted forever.

I know that. Indeed, my question was about how to do selective greylisting
after DATA. SQLgrey does auto-whitelisting.

> when I see abusive greylisting, I "bounce" the message and whitelist the
> client and domain. my server has better things to do.

This part makes no sense to me. If you can whitelist, you are the one
doing the abusive greylisting?

> $ host 77.75.163.100
> 100.163.75.77.in-addr.arpa domain name pointer
> 77.75.163.100.customers.telelet.dk.
> $ host 77.75.163.100.customers.telelet.dk
> Host 77.75.163.100.customers.telelet.dk not found: 3(NXDOMAIN)
>
> you get a REJECT here (generic rDNS gets a reject_unknown_client among
> other things).

How you choose to lose mail is your prerogative.

> what's the point? did you do measures that show how much spam you'll
> block?

The point is to have greylisting while still receiving most mail without
delay.

In particular, mails from web applications are annoying to wait for. Some
of these applications are not even retrying.

Cheers,
Anders.

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