When choosing a new tool for email newsletters, it was important for me that it was Russian. Three years ago, I had an unpleasant experience with a foreign service. Therefore, I carefully checked all aspects, including the location of the servers. Unisender was a perfect fit, as it is a completely Russian tool. The servers are located in Moscow and St. Petersburg, unlike many other companies, even Russian ones. In the end, I chose it and have been actively using it for three years now, and I'm completely satisfied. There were minor issues, for example, the system sometimes froze when starting a newsletter, but it's not critical — a reboot would resolve the situation in a couple of minutes.