File Uploader - Leveraging Our Edge Network CDN

The single most important aspect in email signature performance is the accessibility and delivery speed of the images in the signature - image reliability affects both senders and recipients. We utilize an optimized edge network with images residing at 300 centers around the world. Since 2017 we’ve been serving roughly 1.6 billion images per month (2 terabytes of data) without any significant outages*. The file uploader enables you to host your signature images on our CDN.

* In the last 7 years we've had approximately 50 outages of under 60 seconds and 4 outages of under 10 minutes, and zero outages in excess of 10 minutes.