There have been scattered delays today while sending mail to Google domains. This affects Columbia users on Lionmail, but also users on gmail.com and other Google-hosted domains. In some cases a message is simply transported slowly, giving delays like 5 minutes, and in other cases a message has to be queued and re-tried, leading to a delays from 30 minutes to (one known case) 2 hours.
But most messages still go out promptly. At the present time there are no messages queued for Lionmail.