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copied!<p>This could be for a few reasons:</p> <p>1)It is possible that you're not downloading enough information about the CTCoreMessage. When making a request to download the CTCoreMessages you must specify what information you want by specifying the correct fetch attributes.</p> <p>For example:</p> <pre><code>[core_folder messagesFromSequenceNumber:from to:to withFetchAttributes: CTFetchAttrEnvelope | CTFetchAttrBodyStructure] </code></pre> <p>should populate the information about the attachments.</p> <p>When fetching a message from IMAP, the command will specify exactly what information it wants.</p> <p>you can see what is being fetched by enabling MailCore Logging as follows:</p> <pre><code>MailcoreEnableLogging(); [core_folder messagesFromSequenceNumber:from to:to withFetchAttributes: CTFetchAttrEnvelope | CTFetchAttrBodyStructure]; MailcoreDisableLogging(); </code></pre> <p>You will see commands of the format</p> <pre><code><command number> <UID> <Command> (<requested structure>) </code></pre> <p>I imagine you will see something like this:</p> <pre><code>1 UID FETCH (ENVELOPE) </code></pre> <p>You should ensure that inside the () either BODY or BODY[2] or RFC822 as these will contain information about attachments.</p> <p>When you see what is actually being fetched you can <a href="http://tools.ietf.org/html/rfc3501#section-6.4.5" rel="nofollow">read the RFC</a>, if you are dealing with mailcore and IMAP then it is well worth the investment in time.</p> <p>2)Failing that, perhaps your CTCoreAccount and/or CTCoreFolder are not connected, thus preventing the CTCoreMessage from having a valid mailimapsession and being unable to download the attachment information. If an attribute inside a CTCoreMessage is not available then libetpan should download it on request. The fact that is it not suggests that your account or folder may be not valid or connected.</p>

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