The problem is likely not with your phone but instead with the settings of the sender. The problem with many "modern" email clients is that they create horribly implemented HTML emails that are then a mess when received. What we need is for Apple to add a plain-text reading mode for Mail.
In my old-school opinion, anything other than plain-text should be banned or stripped from email. If you want to send me a formatted document, send me a PDF attachment. If you want to send me a web page, send me the URL of the page you want me to visit. If you want to send me a useful communication, send me a well-composed plain-text email that doesn't require fonts, formatting, tables, fonts, bold, italics, colors, hyperlinks, or useless spinny-flashy things.