Possible solution:
I noticed the "Masquerading options" block in sendmail.mc is placed _after_ "Default mailer setup". I moved the default mailer setup block to the end of the file. This cleared all sendmailconfigs error messages.
Possible solution:
I noticed the "Masquerading options" block in sendmail.mc is placed _after_ "Default mailer setup". I moved the default mailer setup block to the end of the file. This cleared all sendmailconfigs error messages.