In a lab VM environment, I have installed postfix, tried disabling sendmail, postfix logs still say something about sendmail such as
Jul 2 18:21:51 6 sendmail[79052]: 262ILX6p079052: to=m...@mail.pcxx.n2.xxx-xx.org, delay=00:00:18, mailer=esmtp, pri=30112, dsn=4.4.3, stat=queued
Then I...