Hi Dave - I implemented SPF records and they helped, but you're going to find Yahoo Mail blocks your messages even with SPF. I've been fighting a losing battle with them to whitelist my domain. They will only whitelist an IP address, which means we're stuck because Appengine uses many varying IP addresses.
Yahoo basically told me the only solution is to use DKIM. Google recently implemented this for Google Apps mail, but not Appengine. We need a small change to the Appengine mail API to add the DKIM header ourselves - please star this issue if you think it might be useful for you too: http://code.google.com/p/googleappengine/issues/detail?id=3161 I'm not happy to switch mail to another provider because then I have additional points of failure. Cheers Greg. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
