Giampaolo Tomassoni wrote:

The only problem is that a spammer could "query" it days before it will bulk
send, thereby impairing the effectiveness of such approach.

So we check (with DNS) wether a domain MX record exists before adding it to the database. Something like this:

1: It receives a query.

2: It checks in it's database.

3.a, found in database:
* Return result indicating how long ago domain was added.

3.b: not found:
* Adds the domain to the database if MX exists in DNS.
* Return result indicating new domain.

/Jonas
--
Jonas Eckerman, FSDB & Fruktträdet
http://whatever.frukt.org/
http://www.fsdb.org/
http://www.frukt.org/

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