Are you on Debian Sarge? How did you install Postfix? From the sources, as a Debian package, and if as a Debian package, where is it from (debian.org, backports.org, ...)?
My debian system has been updated from woody to what I believe is a sarge system. I'm a little new to debian.
I have installed postfix from debain packages using apt-get
I was following the sarge install howto and using it to set up my mail service.
If I do as you suggested, I get the following:
starbase:/etc/postfix# apt-get install postfix-tls postfix
Reading Package Lists... Done
Building Dependency Tree... Done
postfix is already the newest version.
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
postfix: Conflicts: postfix-tls
postfix-tls: Depends: postfix (= 2.1.5-9)
E: Broken packages
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