Encrypted messages sent using the Symantec Mobile Encryption for iOS app prior to release 188.8.131.52 cannot be decrypted by the PGP Support Package for BlackBerry. The BlackBerry user sees only the cipher text.
The Apple mail client adds additional white space to the encrypted text generated by the Symantec Mobile Encryption for iOS app. This additional white space causes the PGP Support Package for BlackBerry to fail to process the encrypted text correctly.
Note that if Google Sync is used as the mail transport provider on the iOS device, this problem does not occur. Google Sync is now end of life for new users but it was designed to allow access to Gmail, Google Calendar, and Contacts via the Microsoft Exchange ActiveSync protocol.
Upgrade to Symantec Mobile Encryption for iOS release 184.108.40.206 released on 2013-05-14 available from the App Store in iTunes or on your IOS device.
Mobile Encryption for iOS is supported by Symantec Encryption Management Server version 3.3 or above.
PGP Partitioned Format is being used by Mobile Encryption for iOS.
The default Apple mail client is being used.