[CentOS] Rejecting valid mail (including this mailing list)
Ralph Angenendt
ra+centos at br-online.de
Tue Mar 25 22:24:59 UTC 2008
Sam Drinkard wrote:
> One link I ran
> across 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/\#why_rejected"')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
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