Bounce Address Tag Validation (BATV) is the name of a method, defined in an Internet Draft, for determining whether the bounce address specified in an E-mail message is valid. It is designed to reject backscatter, that is, bounce messages to forged return addresses.
I was reading a thread on “dkim-milter-discuss” list on SourceForge, where MSK (Murray S. Kucherawy) was announcing “batv-milter“. A filter which uses BATV that attempts to mitigate backscatter.
Although the method only exists as a draft, I was wondering if somebody tried it already, and if any great web mail company respects this type of email signing?