This happens on occasion because an email provider marks our email as spam by mistake. To make sure you receive our emails and documents, add our email address to your contacts or safe senders list, along with donotreply@appfolio.com, where your lease and other documents come from. Here are guides for two common providers: Gmail: mark an email as not spam and Outlook: add a safe sender.
You can also check your junk or spam folder if you expected an email from us and did not get it. If you find it there, mark it as not spam, and your provider will let our emails through next time.