Can't receive email right after Installation, zimbra.log just says connect disconnect

[wdman]

Originally Posted by phoenix

BTW, you really don't want your Administration port 7071 open to the internet - that's not good security practice.

You mean the https://zimbra.example.com:3554/zimbra/ ?
How do you suggest one should block it?

[phoenix]

Originally Posted by wdman

You mean the https://zimbra.example.com:3554/zimbra/ ?

No, that's not the Admin port it's 7071.

Originally Posted by wdman

How do you suggest one should block it?

Firewall, fail2ban, an IDS (including strong password security set in ZCS) or some other method of your choice? I prefer to have my server behind a firewall or NAT router and only open the specifically required ports with additional security inside the LAN.