Entourage 2016 not updating exchange calendar
If the zoom setting is altered on a new message, the altered setting remains until changed back.
Zoom does not change the actual font size, it simply zooms in or out on the composing window text, (impacts the composing mode window of all new messages/replies).
Another workaround is to forward the email to yourself, remove all the content of the email before sending, except for the attachments.
While the new operating system is not generally available to all users right away, developers and beta testers may have access to beta seeds.
It does not support setting server-side rules to move or manage messages and contacts or to act on calendar events.
That means that all rules created in Outlook 2011 will be applied only when Outlook 2011 is running.
Zoom does not affect the reading pane or received messages - those will show the actual font size.
Once the setting is applied in the Outlook profile, it will retain for all future messages until it is changed in the message Options menu.