Is this for version 1.1? I used DragonBoy's Search Code and found these for 1.0:

Offline Mail Present Attachment Modifier Addresses [1.0]:

Code:
Slot 01: 121D8014 0000XXXX
Slot 02: 121D8108 0000XXXX
Slot 03: 121D81FC 0000XXXX
Slot 04: 121D82F0 0000XXXX
Slot 05: 121D83E4 0000XXXX
Slot 06: 121D84D8 0000XXXX
Slot 07: 121D85CC 0000XXXX
Slot 08: 121D86C0 0000XXXX
Slot 09: 121D87B4 0000XXXX
Slot 10: 121D88A8 0000XXXX
Online (Wi-Fi) Mail Present Attachment Modifier Addresses [1.0]:

Code:
Slot 01: 121D15C8 0000XXXX
Slot 02: 121D16BC 0000XXXX
Slot 03: 121D17B0 0000XXXX
Slot 04: 121D18A4 0000XXXX
Slot 05: 121D1998 0000XXXX
Slot 06: 121D1A8C 0000XXXX
Slot 07: 121D1B80 0000XXXX
Slot 08: 121D1C74 0000XXXX
Slot 09: 121D1D68 0000XXXX
Slot 10: 121D1E5C 0000XXXX
I hope this helps.