Submission Port Problem

I just installed Debian this week from Gentoo Linux. I am using
Sendmail 8.14.1 from apt-get under Debian. With Gentoo Linux I
compiled Sendmail 8.14.1 from source. Under Gentoo I had the
following two lines in my sendmail.mc file:

DAEMON_OPTIONS(`Name=MTA')
DAEMON_OPTIONS(`Port=587, Name=MSA, M=Ea')

Everything worked fine under Gentoo, but I ran into a problem with
Debian. Under Debian I have the following two lines:

DAEMON_OPTIONS(`Family=inet, NAME=MTA-v4, Port=smtp')dnl
DAEMON_OPTIONS(`Family=inet, NAME=MSP-v4, Port=submission', M=Ea)dnl

But, cron and any local generated mail from the server was giving me a
530 5.7.0 Authentication required error. If I remove the 'M=Ea'
portion from the second option cron is able to send mail with no
problems. How come those settings worked fine when I was running
Gentoo, and now that I am running Debian it does not work?

Doesn't the 'M=Ea' option make it so on the 587 port you have to
authenticate? I would prefer that instead of leaving an open port.

Thanks for any help you can offer me.

Jeff