Using SPF or DomainKeys with autoreponder

[GlennP]

When using an autoresponder in Plesk, is it possible to use either SPF or DomainKeys to verify incoming messages have a valid record before sending a reply?

Thanks!
Glenn

 

[GlennP]

The idea is to prevent the autoresponder from replying to spam. I've read about the technique in several places, however not with plesk. Any thoughts on this are appreciated.

Glenn