ificate validation (either a directory that has been processed
by <em>c_rehash</em>, or a single file containing one or more PEM format
certificates concatenated together: see verify(1) -CAfile and
-CApath for more information on these). Set it to an empty string
to disable certificate verification. Defaults to the value of the
<em>sendemail.smtpsslcertpath</em> configuration variable, if set, or the
backing SSL library&#8217;s compiled-in default otherwise (which should
be the best choice on most pl