Hello Long time ago I used Postfix to send automated emails to customers (Slackware, 10+ years ago), then moved to another job and I stopped using it. Now I'm working on a local network and just configured a local DNS server for the LAN and as a first approach I want to setup a local mail system and then configure it for the internet (DNS local+internet and MX local+internet).
By now I am using a virtual server (VirtualBox) as a "sandbox" to experiment safely and the first step is to install Postfix. In the past I had only to rename the "sendmail" and configure Postfix. Today I see that there is a set of packages "exim4", when I try to install Postfix (from the Debian repository, "apt install postfix") it tells that exim4 should be removed (automatically) but there are other exim4* packages remaining. My doubt is: Should I remove/uninstall all the exim4 packages or just the suggested ones? And if so, would it affect something else on the system? The following packages will be REMOVED: exim4-base exim4-config exim4-daemon-light The easiest would be to learn to use exim4 that comes bundled with Debian but surely it is not on other distros. I want to use Postfix as it could be installed on any distro, be package manager or sources (just like in the old times :) So... Do I remove all exim4 packages (suggested and all remaining)? On the next mail I will be asking for help to setup Postfix to work as a local service and configure it with Bind9 by adding an MX record to the nameserver for it. Once working I will go for an internet configuration. Thanks for your help and patience
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