Use plaintext email
There are two main types of emails on the internet: plaintext and HTML. The former is strongly preferred, but often isn't set up by default. We'll get you set up right. HTML emails are mainly used for marketing - that is, emails you probably don't want to see in the first place. The few advantages they offer for end-users, such as links, inline images, and bold or italic text, aren't worth the trade-off. I am 100% in the camp of plain text email, but sadly, very few other people - or organisations - are. Some emails become entirely unreadable when displayed as plain text, which is a pain to deal with.