Domain Support supports SSI; detailed documentation is available. SSI can include cgi-bin programs for those users of the developer packages. At this time, Domain Support does not officially support parsing of SSI in .html files. Files that include SSI instructions should end in .shtml.
The following unsupported method may work: Add the following line into your root directory .htaccess file:
AddType text/x-server-parsed-html .shtml .html .htm
While this may work, it is inefficient and Domain Support does not provide technical support for any problems, complications, or incompatibilities which may arise from this configuration change.