On Thu, 29 Nov 2012, Ed Flecko wrote:

I'll be sure to check into Postgrey.

Are there any special considerations to installing/configuring it or
is it simply a matter of installing, reading the docs and configuring?

The biggest consideration is not technical, it's managing the expectations of your users.

You will need to educate your users that email is *not* instant messaging.

You will probably want to put a little effort into maintaining lists of regular correspondents who can bypass greylisting. There may be tools to automate that, e.g. to whitelist someone a local user has sent mail to.

Some users are extremely allergic to any delays in their email; you may have to maintain a list of exception destination addresses to keep them happy, or for addresses where no delay is acceptable, e.g. <support@...> or <sales@...>

--
 John Hardin KA7OHZ                    http://www.impsec.org/~jhardin/
 jhar...@impsec.org    FALaholic #11174     pgpk -a jhar...@impsec.org
 key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C  AF76 D822 E6E6 B873 2E79
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  "Bother," said Pooh as he struggled with /etc/sendmail.cf, "it never
  does quite what I want. I wish Christopher Robin was here."
                                           -- Peter da Silva in a.s.r
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 26 days until Christmas

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