Sendmail not working right on Slackware current

I've recently upgraded to Slackware Current. I use sendmail, but things aren't working right with that on Current. For one thing, seems to be running postfix instead of sendmail. maillog has only "hostname postfix/" messages and not "hostname sm-mta" or "hostname sendmail" messages like sendmail puts out. postfix apparently does not use /etc/mail/aliases. And, in general, I want to use sendmail. I have milters and other customization for sendmail I've invested time in.

My sendmail.mc file on Current is identical to the 14.2 one. Likewise rc.sendmail is identical and set to executable. When I run rc.sendmail I get:
Code:$ /etc/rc.d/rc.sendmail restart
sendmail: no process found
Starting sendmail MTA daemon: /usr/sbin/sendmail -L sm-mta -bd -q25m
Starting sendmail MSP queue runner: /usr/sbin/sendmail -L sm-msp-queue -Ac -q25m
1 12:31:41 root@quadmon:/usr/share/sendmail/cf/cf
# postfix/postfix-script: fatal: the Postfix mail system is already runningI see nowhere that postix is run from rc.sendmail. At system start rc.M has:
Code:rc.M:# authentication services for sendmail/postfix:
rc.M:# Start the mail server. Try the rc.sendmail script first, then try rc.postfix.
rc.M:elif [ -x /etc/rc.d/rc.postfix -a -x usr/sbin/postdrop ]; then
rc.M: /etc/rc.d/rc.postfix startrc.postfix is NOT executable.

I don't get how this is working. Can someone enlighten me?