About every two hours I keep having an email that comes up from "Mailer Daemon". The email cannot be opened and it bogs down all computers I am on. This morning when I tried to mark an email as read it said "cannot mark email while "copy emails" is in progress. What is causing this? I have ran my webroot and it finds no viruses. It seems as if its in my emails only. Any ideas or ways of solving this?

It could be any number of things that is causing it. A mailer-daemon is what you receive back from a server when it cannot find the recipient of the email. It sounds as if you have a virus on your computer that is sending automatic emails out. If the daemons are all from the same server, you can block that specific server from sending you emails.

So would I have the virus on every computer I use including my phone because even though my computers are all shut off when I turn them back on I have a bunch on there.

Well, you're gonna have to check the server it's coming from, in Outlook, you can block specific senders, so if it's the same server, just block that sender, and it should clear up the problem.

They could have been sent out while your computer was on, and the replies come after you have shut down. Especially if the emails are coming from overseas.