I recently discovered a really nice way to create my Email campaign templates.
The company is called Klaviyo
https://www.klaviyo.com
They have a very simple to use Drag n Drop interface and I have used it for the past several of my newsletters.
They let you export the email as HTML which I can then drop into Sendy and add the custom unsubscribe links, webversion, etc. to the email.
it is great! Free to setup an account and create unlimited templates, etc.
Love Sendy!
Best,
Simeon Amburgey
PraiseTracks.com