Add ItemSend event (so add-in can cancel email)
Would like to have an ItemSend event in the web API just like the regular API does. Is that on the planning stage for future releases?
Feature is available in Old Outlook for Web (OWA). Work is in progress on supporting it on new OWA, Outlook Win32 and Outlook for Mac. We will update as soon as the feature is available for preview.
On new item even will be useful as well.
Although that request is for Excel and Word, the same events are needed in Outlook addin to aid in development of apps that work the same as current client addins work.