FunnyPocketBook

Total newbie question: Can I somehow track emails going out from webmail? I have a website and with the webhosting came email addresses that I could use. (is this even English?) My host is using roundcube as email client, or whatever the real term for this is. I know that there are services that allow tracking for Gmail and Outlook, but I couldn't see an option to "connect" my email from the website with Gmail or Outlook. I still want to know whether my emails have been opened or not, as this is essential to me for organizing the dates. I won't mind it if I have to do some non-trivial steps to achieve the tracking, as long as there is a descriptive guide to do that. By googling I found Piwik, but I have absolutely no idea what exactly it is and what I can do with it. Also, since English isn't my native tongue and I am totally new on this topic, I'd appreciate correcting my mistakes (using the wrong terms etc.) Thanks in advance!

I'm not really paranoid and I have no problem with restoring my PC to factory default because I backup my data regularly. Now that I am typing this it is kinda obvious that I don't need an anti virus...

I am currently using Bitdefender 2017 Total Security and it has never detected anything bad except for false positives. I am a very cautious user and don't really do anything with files/websites that I don't know. So since my antivirus doesn't detect anything bad on my system, should I just remove it and let Windows Defender do its job?