We have released a fix to the Sender/Recipient showing "No" for Gmail users.
If you are still seeing the "No" Issue, please refresh Cirrus Insight within the user's personal settings of Cirrus Insight in Gmail. You can access this by going to Settings (wrench icon) > Application > Account Information > Refresh Cirrus Insight.
If anyone still has any issues after those steps, please reach back out to Cirrus Insight Support.
Mar 4, 13:58 UTC
A subset of users in Gmail have reported an issue where the sender and recipient are being labeled as "No" when viewing an email. If you select the drop-down within the email it will list the sender and recipient correctly. This is not affecting Email Sync nor Add to Salesforce. We are working on deploying a solution in the near future.
Mar 3, 18:55 UTC