By default, the Traveler client will only download attachments lower than 500k.
All bigger attachments will have to be downloaded manually, one by one (if multiple exist).
Even after clicking the "Download" button for truncated mails, the attachments aren't downloaded until you select them one by one.
When forwarding a message with attachments bigger than 500k, those will not be forwarded and only a small notification appears for a second or two, notifying that only downloaded messages will be sent.
I think it would be good to ask the user if he wants to download the attachments and the missing content of the truncated body before forwarding the message, because the small notification you see for a few seconds isn't always clear or seen by the users and when forwarding a message you usually want to forward the attachments included...
Tell me what you think...