Sam Drinkard wrote:
One link I ranacross said that ordb.org went out of business or stopped their service in Dec of '06. If that's the case, why is their info still being listed in some of the sendmail configs, and others still advertising it's use.
dnl # FEATURE(`dnsbl', `relays.ordb.org', `"550 Email rejected due to sending server misconfiguration - see http://www.ordb.org/faq/%5C#why_rejected%22%27)dnl
host relays.ordb.org comes back with
Host relays.ordb.org not found: 3(NXDOMAIN)
So yes, that blacklist isn't there anymore.
Why sendmail choses to block mails when the dnsbl isn't reachable should be asked on some sendmail related list.
But: If you plan to use blacklists, you *really* should know *why* the blacklist blocks *what* *when*, as you are letting *others* decide on what to do with your mails. Which - IMNSHO - is plain stupid.
So if you don't know what the blacklist is doing: DO NOT USE IT.
And if you're not really really really sure what you are doing regarding that: Don't do it.
Cheers,
Ralph