autoresponse[66556]: Unauthenticated attempt to set autoresponse message for mailer-daemon from 127.0.0.1!
Authentication-Warning: autoresponse set sender to mailer-daemon using -f
SYSERR(autoresponse): Too many hops 27 (25 max): from mailer-daemon via localhost, to
DSN: Too many hops 27 (25 max): from mailer-daemon via localhost, to
relay=autoresponder, delay=0.18, delays=0.06/0/0/0.13, dsn=5.3.0, status=bounced (service unavailable)
yum remove sendmail
service postfix restart