I just recently installed zpanel on a droplet to use its website host and email exchange services! The website is working fine so far but the I'm running into some issues on the email part. It seems that most of the time the emails get marked as spam and when the reciever is using Outlook they don't even get the email in their spambox because it was already deleted on the incoming server. I would like to know how to step up the email so it isn't marked as spam by almost all servers! Also, I have another droplet with a similar configuration that I used for testing and it is impossible to exchange emails between eachothers domain because zpanel or roundcube instantly deletes de email from the other source (I supose) and I don't know how to open a exclusion or turn that off. Sorry for the explanation, I know it is kinda confusing :/