The present invention relates to a processing method for a mobile device to display an email, a server, and a mobile device. The method for processing an email includes: after receiving an email downloading request from a client, checking, by a server, a processing capability of the client, where the processing capability is reported to the server by the client when the client is connected to the server, and where the processing capability includes a supported coding/decoding manner and character set; in the case that the client does not have a capability for processing an email that is requested to be downloaded, converting, by the server and according to the processing capability of the client, a body of the email into a format that is processable for the client; and sending, by the server, a converted email to the client, so that the client displays an attachment.