Blackberry SWD-20120924140022907 Changing how the BlackBerry Messaging Agent reconciles attachments to the messaging server

Changing how the BlackBerry MessagingAgent reconciles attachments to themessaging server

The BlackBerry Messaging Agent receives message attachments from supported BlackBerry devices and reconciles the

attachments to the messaging server. The BlackBerry Attachment Service does not convert the attachments.

The entries in the CMIME service book on BlackBerry devices indicate whether the BlackBerry Enterprise Server supports

attachments that users send from their BlackBerry devices. Users must have BlackBerry Desktop Software version 4.2 or

later installed on their computers to make sure that these service book entries remain on their BlackBerry devices during

service book updates over a physical connection to a computer that is running the BlackBerry Desktop Software.

By default, the BlackBerry Messaging Agent limits the file size of attachments that it can receive from a BlackBerry device

to a maximum of 3 MB. If the BlackBerry Messaging Agent receives more than one attachment at a time, it limits the total

file size of all of the attachments to a maximum of 5 MB.

Data that a BlackBerry device and the messaging server send each other over the wireless network must be in packets that

are no larger than 64 KB. If a BlackBerry device sends an attachment that is larger than a single packet, the BlackBerry

device divides the attachment into multiple packets. The BlackBerry Messaging Agent caches all of the packets and sends

the attachment to the messaging server after it receives the last packet.

You can optimize the amount of memory and the number of transactions that the BlackBerry Messaging Agent uses when

it receives attachments by changing the maximum file size of attachments or preventing users from sending large

attachments.

Users with BlackBerry devices that are running BlackBerry Device Software version 4.5 or later can download attachments

in any native format to their BlackBerry devices. Users can open and make changes to native file formats using an

appropriate third-party application on their BlackBerry devices. Users might be able to open specific file formats using the

media application on their BlackBerry devices.

To manage network resources in your organization's environment, you can change the maximum file size of attachments

that users can download to their BlackBerry devices.

By default, the maximum file size of a single attachment that users can send is 3072 KB, and the maximum file size of

multiple attachments that BlackBerry devices can send in a single email message is 5120 KB.

Administration Guide Managing your organization's messaging environment and attachment support

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