Yahoo! Greylisting!

Posted by Toby Wed, 07 Mar 2007 12:09:00 GMT

Yahoo! has started to greylist. One of the mail servers that I manage has a number of large mailing list on it and one of them has a lot of Yahoo! email addresses. Here are the effects of this on the server.

CPU Usage

Network Usage in Bits per Second

I hope they don’t expire the whitelist too quickly.