This is why I love Linux From Scratch... :(

[Matt Graham]

On 2013-12-16 13:19, kitepilot at kitepilot.com wrote:
> I need to install Postfix and courier-smtp in Debian.
> If I install Postfix, Debian removes courier-smtp.
> If I install courier-smtp, Debian removes Postfix.

> Does anybody know how to explain to the F$#%ING package
> manager that I want to install both?

Two MTAs at the same time?  What are you trying to accomplish?

I would guess that Debian's package manager is only allowing one MTA at 
a time because both packages provide files that have the same names.  On 
this Gentoo box, postfix provides /usr/sbin/sendmail , and so does 
mail-mta/courier.  The ebuild files for mail-mta/courier have all the 
other MTAs listed as "cannot be installed at the same time as courier".  
It is of course possible and easy to install courier-imap and postfix at 
the same time, and that setup's been working quite well for me for the 
last 6 months.

I suppose you could build one of the MTAs from source and install it in 
/usr/local/ .  No collisions would happen then.  But I still want to 
know what you're trying to accomplish and how LFS manages to handle the 
inevitable /usr/bin/sendmail name collision.

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