How to locate the version of sendmail

Q:What is the best way to locate the version of sendmail one is using?

I'm using whatever sendmail comes with SunOS 5.5.1, and, the manpages
don't seem to list a -version command (-v is verbose mode, but, I can't
seem to get it to spit out the version).

According to procmail digests, I want to at least make sure the sendmail is
version 8.8.5 or better.

Thanks for helping me and others,
John