Disposable email addresses - often called burner emails - should not be regarded as valid for email send purposes or for allowing through sign-up forms as it is unlikely that user wants to communicate with you.
There are many services available that allow users to use a disposable email address. Typically these email addresses are used by individuals wishing to gain access to content or services requiring the registration of an email address. These individuals do not wish to divulge their true identity or permanent email addresses.
Although we actively scan for and identify new disposable email addresses every day. New disposable email addresses & providers appear, which we are unaware of but we do try to include these as soon as possible. If you ever discover a disposable email address that our service has not recognised. Please let us know and we will add it to the ever-growing list.