We've been using mailbaby mainly for a bit of outbound protection and avoidance of blacklisting until better measures are available within Enhance.
The problem is I don't want to have to modify SPF records during cPanel migrations to authorize mailbaby and dns templating just creates a duplicate SPF.
Any busy email roles on Enhance estates without a smart host, and do you have many issues without outbound email? Any other advice? I'm starting to migrate cPanel accounts and need them to complete as quickly as possible with as little massaging as possible.