The default submit.mc contains: FEATURE(`msp')dnl dnl FEATURE(`use_ct_file')dnl if you remove the commenting on the second line, re-generating the submit.cf will complain about wrong order of options. Reversing the option order will avoid this, and enable use_ct_file better when modifying the out-of-the-box configuration
http://people.redhat.com/laroche/sendmail-8.12.6-3 has this fixed. Thanks a lot, Florian La Roche