Hi, First I would like to specify that I have very few experience with Linux and that I've been asked to setup an SMTP server for a small company of about 50 employees. Everyone will access the smtp server from the inside of the network.
I'll start very general and if needed will go deeper in my interrogation of setuping the different elements of my server.
I'm doing this on the latest version of Debian, Linux Kernel 2.6.x
I've been recommended to use Postfix since it's not too hard to setup and do about everything we need.
I've been inspecting our old SMTP provider emailsí header and I also notice they were using it. So I know it's possible.
I've done a lot of testing, reinstalled Linux 2-3 times since a week and I can say that I understand the basic of it. However, everywhere I look at it, I see that Postfix does not seem to let me post Email in the outside world without any sort of Authentication like Cyrus for example. Like I said, our hold SMPT provider was using Postfix but we never had to authenticate our connection to it. Even more, I was able to impersonate about anyone inside or outside out network without any problems, which was useful for me to build engine to send email from NoReply@something.com
for example via our different software, without having to setup the NoReply user. I even tried to joke around with a coworker and sent him an Email from BillGate@Microsoft.com
Basically that's what I'm trying to reproduce. A Linux SMPT mail server with open policies, minimum of security which can only be access from inside our network but sending without restriction to any outside domain.
Could, anyone tries to list the different applications I would need in order to achieve this?
For example, is PostFix with Dovcote would do the trick?
Thanks for your help ?