Why not send your sponsored emails from your usual email platform?

Most newsletter platforms, like Substack, do not allow sending promotional or sponsored content through their system. If you use Substack and send sponsored emails regularly, you risk having your account suspended.

On other platforms, adding sponsored content can also hurt your newsletter’s deliverability and overall performance.

That’s where Subletter comes in. Subletter lets you send your sponsored emails through our dedicated email-sending platform, while you continue to use your usual newsletter tool for your regular content.

We handle deliverability, compliance, and all the technical complexity for you—so you can focus on creating great content and securing sponsorship deals.