Help Sony Xperia Tipo (ST21i) Exchange issue auto sending old emails already sent


Hello All,

In my organization we are experiencing an non documented issue.
We are working under Exchange 2010 SP2 rollup 3, and some users are reporting an strange issue with the device Sony Xperia Tipo.

This issue is not constant, occurs randomly and not with all of the Sony Xperia users. The result is that some sent emails ( 2 months or more ago) are automatically forwarded without body to all of the recipients of the original email. The result is that the device automatically send emails already sent, but send it without any content, without body.

Device specifications:
Sony Xperia Tipo ST21i
Android 4.0.4.

Any clues?

Thanks in advance