6. Pressure to reply. Once it’s in your inbox, you feel an ever increasing obligation to act on it. Procrastinating doesn’t making it go away.
7. Spam. Having to deal with spam and spoofs is one of the worst avoidable time wasters online.
8. Sucks up your time. Over checking messages is so common, but it is time wasted on low value, passive activity.
9. Too long. How long is too long? It’s hard to say exactly, but the longer it goes on, the harder it is to take in. Email is suited to brevity.
10. Viruses. A virus could seriously affect your computer. If you want to know how to use email effectively, it's worth learning how to deal with these.