Hello,
It isn't perfect. And it is just tinkering. I make sure to put my name and phone number on the error messages. When I ran the test earlier this year, one person called. He said he was trying to send me an advertisement ;-) and that the company was located in New Zealand or Australia however he was working out of San Diego.
The biggest flaw right now is that it uses the host name (from the email address) to determine the IP. It really needs to look up the MX record and use that for the domain check. I am pretty sure I had it set that way when I built the "first version". However it seems I overlooked that on this go-around. One example where it doesn't work is prodigy.net - they don't have an A record for "prodigy.net".
Somebody pointed me to SPF. http://spf.pobox.com - This really looks good. I hope people start using it, would be a good solution. I am adding SPF check to the plugin, right now it will just collect data. To see what kind of results I get.
Here are the latest stats from my this test:
Total 3,187 Country Mismatch (#1)
1,658 52.02 %
Well Known Mismatch (#3)
590 18.51 %
Blacklisted (#2)
18 0.56 %
Total Blocked 2,266 71.10 %
Take care
Waitman
Skaag Argonius wrote:
While I like number 2 and 3, I know for sure that number 1 is absolutely flawed. You can't run a production mail server with this method without losing customers for loss of important emails.
Skaag
