I'm happy to see that SMTP has found its way into the Ultimate Branding plugin. Yet a great improvement, from my perspective, would be to add an option to allow network sites to configure their own SMTP.
This could be useful for many situations, like:
– Sending a newsletter from a sub site.
– Sending order confirmations.
– For sub sites with members.
… To name a few.
Currently, as far as I'm aware, there is no SMTP plugin that allows to set a network default, which can be overwritten on a per site basis. I think it would be a welcome feature.