Your email marketing won’t work anymore unless you follow these 3 new rules from Google and Yahoo. Google and Yahoo are making changes to email marketing… especially for marketers who are sending out blasts to 5000 or more people per day. The first is your emails need to be under a spam threshold limit.That limit is ideally .1% or lower. It can’t go above .3% or higher or else your emails won’t be getting placed in people’s inbox. The second is they want you to authenticate your email. They want