This is actually a request for the Sendy web site, not the application itself.
I appreciate that Sendy is under constant development and I'd like to be aware of updates as soon as they're released, especially in the case of security updates. Currently the way to find out about an update is to sign in to Sendy and notice the "new version" notice in the footer. This is great, but people who don't sign in regularly may go weeks without applying a critical update (or even a minor bugfix that they need).
I'd love to see an RSS feed on Sendy.co that I can subscribe to in order to see update notifications as they're released. This is how I keep track of most of my other web app updates -- WordPress, Redmine, etc -- and it would be great to get Sendy update noticed this way as well.
I think this would be really helpful for a large number of your customers as well. Thanks.
(Also, on an unrelated note, I'd like to see posts here not closed once they're replied to. It makes it impossible for other readers to leave feedback or questions/comments about the subject at hand.)