Yesware

I like the fact that unlike most email tracking programs, Yesware actually plays nice with MSFT Outlook. Most of the compeition is gmail only.

Bit of a resource hog. Also it sets off false positives with my anti-virus program and sometimes it crashes outlook.

It is very easy to use and light on the system.
I was able to access all my client emails and keep track of them on yesware. Most importantly I loved the way yesware functioned and it always asks before installing on your other emails so that it does not interfere with every other email.
Also, I like the interface and it makes me understand and also gives alerts when the user has read my email and has checked out my links and read my material.

The support is not so great. I did not get to see 24 hour phone or chat support which disappointed me. They can bring more features compared to other tools in the market.

We've been using it for several years and were notified recently by Yesware that the version that supports local versions of Outlook 365 is being eliminated. We were told that Microsoft is limiting the ability of developers to use plugins for PC-based Outlook, so they are dropping support for that in August 2020. We use our own ISP for email, using POP/SMTP mail, not a cloud-based environment hosted by Microsoft or Google. What we liked about it was its simplicity once set-up, and the ease of telling whether or not someone opened the email sent, and where that person was located.

The support organization was Zendesk, a third party. We found that every time we'd have a question or issue they were very responsive, but it took forever to get resolved. Most of the time we'd just live with whatever it was we were dealing with.