It will remove the sendmail *package*. However, postfix comes with a "sendmail" binary program that is used by cron et. al. and does the expected thing (local mail submission).

_________________
The irony is that Bill Gates claims to be making a stable operating system and Linus Torvalds claims to be trying to take over the world.
-- seen on the net

By binary, you mean a symlink to /usr/sbin/sendmail and /usr/sbin/mail.

Not on my system (standard debian postfix):

$ ls -l /usr/sbin/sendmail
-rwxr-xr-x 1 root root 22084 2008-09-14 09:09 /usr/sbin/sendmail
$ ls -l /usr/sbin/mail
ls: cannot access /usr/sbin/mail: No such file or directory

If you meant /usr/bin/mail, that's a completely different program for reading/sending mail, which uses /usr/sbin/sendmail for the latter.

_________________
The irony is that Bill Gates claims to be making a stable operating system and Linus Torvalds claims to be trying to take over the world.

-- seen on the net

Actually, both sendmail and postfix were installed when I got the box, but postfix was neither configured nor running. I tried configuring postfix based on posts that I found (which lead me here), got frustrated, realized it was holding up actual development, so disabled that on boot and re-enabled sendmail until I could dig deeper into it (having mail for the main domain would be very nice, but not the top priority).

Thing is, since I did that as near as I can tell no more mail has been delivered to root. Not sure why, since I never touched sendmail's config aside from disabling and then re-enabling it at boot time (which is not actual in sendmail's config).

-Michael