If nothing else, you should likely add a disclaimer to your rules as you can't control the threshold at which a site may be blocked for excessive queries. I doubt that most users on this list have email volumes as low as yours (100?), and will go well above the thresholds you've tested. I am a what I consider a small site, yet I know I would generate well in excess of 100,000 queries in 24 hours.
So, what happens with your plugin should a timeout or ban occur? Giampaolo Tomassoni wrote: > It depends upon how many e-mail you scan. In about 24h I just issued more or > less 100 queries to the to several TLDs' whois servers. What is it, 10 > queries per TLD? It doesn't seem too much to me... Also note today I'm > probably not going to get the same numbers, thanks to caching. > > Of course, people scanning 1,000,000 messages a day would probably get > banned: it would end in roughly 200,000 queries issued per day (say 8,000 > per TLD). > >
