[TAG] Using DNS blacklists to reject mail.
joey at linuxamd.com
Sun Sep 21 18:56:20 MSD 2008
Michael Makuch wrote:
> Initially I used a long list of DNSBLs including spamhaus, abuseat,
> njabl, blitzed, dsbl,
> ordb, JAMMConsulting and uceprotect. But over time I have shortened that
> list and I
> currently only use zen.spamhaus.org.
> I recommend DNSBL. I wish that many more ISPs would use DNSBLs as I
> think they would work even better.
So using multiple DNSBL's together is relatively safe. I have heard that
using zen.spamhaus.org is not recommended for users using SMTP
Authentication on their server as it might block the roaming users from
Although I would think that perhaps the priority of the lines in the
configuration of sendmail could be arranged so as to allow users that
authenticate to bypass any ruleset?
Actually I would think that authenticated users could bypass such rules
regardless just as they do in order to relay?
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