To help ensure optimal deliverability to Yahoo! addresses, we are strongly encouraging all clients who use a non-jangomail.com From Address to ensure that their email messages are signed with DomainKeys. If you send from your @jangomail.com address, your messages are already DomainKeys signed. If you send from your own email address, then you need to setup JangoMail to sign messages for your domain.
Instructions on setting up DomainKeys can be found in this JangoMail DomainKeys Tutorial.
This week we will proactively be sending emails to those clients that send non-DomainKeys signed emails in order to encourage them to set up DomainKeys.