STARTTLS=client version=TLSv1/SSLv3, verify=FAIL
Another way is to edit the current sendmail.cf file and make sure
this line is in it and uncommented:
O TLSSrvOptions=V
This tells sendmail to NOT request the client's certificate. Note that
this option is not safe and is only present in sendmail V8.12.x.
Really a bad idea to edit the sendmail.cf directly. Each service restart
will delete such a manual direct setting in the .cf file! And editing
the sendmai.cf directly often causes errors. Even the OP did set that
with define(`confTLS_SRV_OPTIONS', `V') in the sendmail.mc file.
