Hello,

I have a test server I am using to learn how to set up and configure different set ups in Linux. I got mostly everything working but I am trying to set up mail services on the server and seems to be having a really hard time in doing so. This is what I have done so far.

When I first started, I was told I could use Dovecot and Exim to do what I needed. I looked up how to configure them and spent days trying to get it working but nothing. I tried to connect with Roundcube and it does not work and I get the following error:

Connection to storage server failed.

I was then told to remove Dovecot and Exim and use Postfix but still getting the same error.

I just have one domain name on the server and I want to send e-mails from the server and receive e-mails to that server with the domain name user@domain.com

ANY help even small would be GREATLY appreciated as I have been lost for days.

Thank you!!

Dovecot is an IMAP server (among other things), which you need for your webmail app to connect to.
You also need an MTA, either exim or postfix, to send and receive SMTP traffic.
I would suggest Postfix, simply for the better documentation and ease of setup.

Unless you clearly understand the concepts, and the roles of each application in the process, installing them all at once then trying to figure out why it doesn't work is going to be an exercise in frustration.

Start with the MTA (postfix) and get that set up and working and tested.
Add dovecot, configure that, and test it out with a regular mail client.
Finally, add Roundcube and connect it to your working imap and smtp servers.

Thank you!!