Checkdomain Setup Guide

Who is Checkdomain for?

Checkdomain is a German domain registrar and hoster (based in Lübeck) focused on small businesses and freelancers. German-speaking support, servers in Germany, ISO 27001-certified datacenters — good fit if you want EU/DE hosting with GDPR clarity.

This guide covers registering a domain and setting up your first business mailbox.

Step 1: Register your domain

1. Go to checkdomain.de and search for your desired domain
2. Review the pricing — .de domains are inexpensive; .com and others vary
3. Add to cart and create an account (DE billing required)
4. Complete purchase — domains are usually live within minutes

You now have ownership of the domain and can manage DNS records from the Checkdomain control panel.

Step 2: Configure DNS

In the Checkdomain panel: Domain → DNS. You'll see the default records (NS, SOA, a default A record). Common additions:

• A record pointing to your web server IP
• CNAME www pointing to your domain
• MX record pointing to Checkdomain's mail servers (or your external provider)
• SPF, DKIM, DMARC (see our setup guide)

Changes propagate within 15 minutes to 24 hours depending on TTL.

Step 3: Set up email mailboxes

Checkdomain's email tariffs range from free (basic) to pro plans with larger storage. To create a mailbox:

1. Domains → Email → Mailbox add
2. Choose the address (e.g. kontakt@yourdomain.com)
3. Set a strong password
4. Configure forwarding or catch-all as needed

Webmail is immediately available at checkdomain's webmailer URL. For desktop/mobile access, use IMAP or POP3.

Step 4: IMAP/POP3/SMTP settings

Checkdomain's standard mail settings:

• IMAP (incoming, recommended): server imap.udag.de, port 993, SSL/TLS
• POP3 (incoming, legacy): server pop3.udag.de, port 995, SSL/TLS
• SMTP (outgoing): server smtp.udag.de, port 465 (SSL) or 587 (STARTTLS)
• Username: full email address
• Password: the mailbox password you set

Works with Outlook, Thunderbird, Apple Mail, Gmail (as external account), and mobile iOS/Android clients.

Step 5: Send a test and verify authentication

Send a test email to a Gmail address. Open the email in Gmail, click "Show original" — you'll see the SMTP headers including SPF/DKIM/DMARC results. All three should read "PASS."

Verify your authentication setup with our SPF/DKIM/DMARC checker and MX record tool.

Tips for smooth operation

• Use subdomains (mail.yourdomain.com) for newsletter traffic to protect your main domain's reputation
• Keep an eye on monthly send limits in your tariff
• Checkdomain offers 2FA — enable it in the control panel
• Export important emails regularly — have a backup outside the provider