Hi all, I've successfully installed ISPConfig on a CentOS 6.4 server (using this tutorial), and everything appears to be working fine, except for e-mail. Unfortunately I'm not very experienced with mail servers, so I don't really know where to start looking. Basically, I can not log in on my mail accounts. Outlook, nor Squirrelmail seem to work. When I try to login via Squirrelmail it takes a very long time to load, eventually resulting in a Gateway Time-out. Same story for outlook, it's trying to connect for quite some time, without success. (Time-out). I've checked my DNS and firewall settings (I use the CentOS firewall), but they appear to be fine. Here are my DNS records (using an example IP address and domain): Code: @ MX 10 mail.domain.tld. mail A 18.104.22.168 It's a clean installation. I closely followed the tutorial and I haven't changed anything yet. What could be the cause of this issue? Thanks in advance!