On 30 OCT 2004, Peter J. Holzer said:
Last time I looked, MTAmark needed only a couple of TXT records. No
change of DNS or BIND necessary.
Ah, thank you Peter. The light comes on.
To be really honest, I'm small fry. I don't do my own DNS -- I let my
registrar do it. And the interface they have doesn't seem to allow for
TXT records.
You aren't the only one. My ISP doesn't delegate reverse DNS for /29
networks, so I couldn't implement MTAmark for my home network myself but
need my ISP to do that. (OTOH, maybe that isn't that bad - let ISPs
publish MTA=no indications for their whole range and customers who want
to run their own MTA have to explicitely tell their ISP).
This is why the light took so long. I read the spec but didn't get the
part about the TXT records for reverse lookups being the only valid ones.
That means I can't set them myself, but must rely on the controller of my
address range to do it (which might NOT be my ISP). This does not seem
onerous; I'd expect them to be eager to cut the spam transiting their
network. I would certainly be willing to pay a fee to allow my mailserver
access to the network. Some of the ISP's (particularly those in Asia and
Latin America) just don't seem to care what their network emits -- they
take the money and turn a blind eye. I have whole countries on my
blacklists now. What a pain.
The problem is that SPAM is business -- the big spammers would find the
maximum fee I'm willing to pay chump change (throw away money).
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