<span style="background-color: transparent; color: rgb(88, 88, 88);">If you've ever experienced</span> problems with your email on your iPhone<span style="background-color: transparent; color: rgb(88, 88, 88);">, the first thing you should do is update iOS. Updates to iOS are free and you can install them using iTunes or without it. The updates contain fixes for bugs and improvements. If your email is not working after installing an update, it may be because your email provider changed something. In that case, the updated iOS version must be compatible with the new email settings.</span>
See also - https://emailspedia.com/aol-email-is-not-working-with-outlook/