DKIM-Verify is a software application that can provide DKIM verification for non-DKIM-aware MDAs. Using DKIM-Verify, which functions as a "wrapper" for the MDA, mail originating from and destined for the local domain can be verified. In addition, DKIM-Verify can integrate with mailing list software to provide verification of messages received for later distribution.
Scalix Virtual Appliance includes a full installation of the popular email collaboration software Scalix. The only two applications installed in addition to Scalix and its required components are Joe (a simple text editor) and VMware Tools. This appliance should work with any recent version of VMware.
Open-Xchange Virtual Appliance is a virtual appliance/machine that includes a full installation of the popular email collaboration software Open-Xchange. In addition to Open-Xchange, it includes Dovecot, since Open-Xchange is not bundled with any IMAP or POP3 server. It also includes Joe (a simple text editor) and VMware Tools. The appliance was installed using Open-Xchange official guidelines.