We have a user with an iPhone 4s who receives email via POP. His email has been working normally until recently when he reported that the body of some messages do not download. In place of the body the iPhone displays, "This message has not been downloaded from the server." These are routine messages. Some (but not all) have attachments. Some are from senders who are normally received without a problem.
Does anyone know how to configure an iPhone to download the complete message everytime?
Also; Does anyone know how the iPhone mail app receives mail? Does it, for example, download headers first and retrieve bodys later?