Mailshake is very easy to use. Most of the ESPs are complex but it's is very simple and their support is very good.

I really like how Mailshake enables me to send out emails to my lists without them getting caught in spam filters and allows me to distribute large numbers of emails at once. It also helps me monitor responses, which is pretty handy. Mailshake makes it easy for me to advertise my services to a large number of people. I appreciate how I can maintain contact lists and templates and use emails for different groups, returning to previous contacts throughout the year. Mailshake organizes everything in a very simple manner. Additionally, the setup was very straightforward.

For the price, it cannot be beat. I've used it off and on since 2017 or so and it's gotten even better since then, obviously. There have been a lot of new companies that have come up and they have some cool features, but MailShake is just so much easier to use, while also giving you a lot more freedom. There aren't a lot of upsells like there are in SalesHandy or Instantly, and the UI is fairly simple to use.