[lolinder]

I believe that you didn't intend to mislead, but "end-to-end encryption" is a term of art and you don't meet the definition. It would only apply to your product if you had some sort of synchronization between clients and you didn't have the keys to decrypt that data.

What you're describing is "encrypted in transit" and "encrypted at rest". Encryption in transit is table stakes for any software today, not a differentiator. As for encryption at rest, if I saw that I'd wonder why my email content is ever at rest on your servers.

Again, I don't think you meant to mislead, but it's important to use terms of art accurately, especially when marketing to professionals in the field.