The following platforms are currently supported.

Microsoft Windows

The application will run on all Windows Servers for which Domino is supported. (Both 32 bit & 64 bit Lotus Domino is supported).

IBM i / AS/400

The application will run on IBM i V5R3 and above.
NB. Crossware Mail Signature requires the International Components for Unicode (ICU) Option 39, to be installed on the server.

Sun Solaris

The application will run on Solaris 8, 9 and 10.

AIX

The application will run on AIX 5.3 and above. (Both 32 bit & 64 bit Lotus Domino is supported).

Linux

The application will run on Red Hat 7.2 (and above) and SuSE 8 and above.

zLinux

Only 64 bit Lotus Domino is supported.