Air transportation

So, I recently started using email as a marketing tool, I try to actively send emails with really interesting and useful information. But how do you know if it works at all or not?

Is this somehow possible to calculate? I think that if such data can be obtained, it can only be by working with some kind of marketer.

There are more accessible solutions for calculating efficiency. I use the online editor Stripo, with which you can create various custom emails. However, this online service provides many additional tools and functions, including open rate calculator. The calculator is extremely easy to use, and you can quickly find out how well your emails are working as a marketing tool.