Hello, I installed the latest (non-beta) version of ISPconfig about 3 months ago on Ubuntu 18.04 using this script: https://www.howtoforge.com/tutorial/ubuntu-ispconfig-automated-install-script/ I selected the default Mail Server type: Dovecot. Webserver is Nginx. ISPconfig is installed on this example domain: u18n.domain1.com After setting up ISPconfig and adding a website, ISPconfig and the website worked well. Now, I've added another static website on this example domain: newdomain2.com. I setup DNS on ISPconfig for this newdomain2.com but then decided to use my domain registrar's DNS, so turn OFF the DNS in ISPconfig. My DNS records are as follows: A Host: mail Value: 184.108.40.206 TTL: 1 min. A Host: @ Value: 220.127.116.11 TTL: 1 min. A Host: www Value: 18.104.22.168 TTL: 1 min. TXT Host: default_domainkey Value: v=DKIM1; t=s; p=MIIBIj((as generated by ISPconfig)) TTL: 1 min. MX Host: newdomain2.com Value: mail.newdomain2.com Priority: 10 TTL: 1 min. In u18n.domain1.com ISPconfig's MAIL I added a Domain for newdomain2.com Then, I added a mailbox user: [email protected] When I click on the [webmail] icon following the above mailbox user, I get a new browser opening on: https://u18n.domain1.com:8080/webmail << this is using the ISPconfig / host domain >> MxToolBpox.com gives me the following results when Test Email Server is done on: mail.newdomain2.com https://www.screencast.com/t/tqftJdh0JibY I believe my DNS records are ok. I'm not sure what to diagnose or try next to get working webmail accounts? Please reply with explicit details, as I'm not an expert with email server setup. Thank you.