1. A method of displaying attachments associated with an electronic message, comprising: on a client system: displaying an electronic message in a first instance of a client application, the electronic message including a first attachment viewing link corresponding to a first attachment associated with the electronic message; the first attachment having a document type; and in response to a single user action consisting of selection of the first attachment viewing link: obtaining, from a document storage system, a first converted document corresponding to the first attachment, wherein the first converted document is converted in response to the single user action and has a document type different from the document type of the first attachment; and displaying the first converted document in a second instance of the client application.
1. A method of displaying attachments associated with an electronic message, comprising: on a client system: displaying an electronic message in a first instance of a client application, the electronic message including a first attachment viewing link corresponding to a first attachment associated with the electronic message; the first attachment having a document type; and in response to a single user action consisting of selection of the first attachment viewing link: obtaining, from a document storage system, a first converted document corresponding to the first attachment, wherein the first converted document is converted in response to the single user action and has a document type different from the document type of the first attachment; and displaying the first converted document in a second instance of the client application. 8. The method of claim 1 , further comprising displaying the first converted document in a manner dissimilar from a manner in which the first attachment is displayed by its associated native application program.