Checkdomain Setup: Hosting, Webmail & Email 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

Go to checkdomain.de and search for your desired domain
Review the pricing — .de domains are inexpensive; .com and others vary
Add to cart and create an account (DE billing required)
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:

Domains → Email → Mailbox add
Choose the address (e.g. kontakt@yourdomain.com)
Set a strong password
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.

You don't need a mail client at all to use your mailbox: the Checkdomain webmail login is available in any browser at checkdomain.net/en/webmail (German interface: checkdomain.de). Sign in with your full email address as the username and the mailbox password you set in Step 3.

The webmailer covers the everyday essentials directly in the browser:

Send and receive email, create folders to organise your mail
Set up a signature and change the displayed sender address
Create filters for incoming email and a dedicated spam filter
Display the full email source code — handy when you check SPF/DKIM headers

If you can't log in, reset the mailbox password in the customer area first — webmail and IMAP/POP3 always share the same credentials.

Setting Up Checkdomain Hosting

Beyond domains and mailboxes, Checkdomain hosting packages bundle webspace, email mailboxes, traffic, spam and virus protection, and databases. Everything is managed from the same customer area (My Login → Customer Area on checkdomain.de):

Order a hosting package and assign your registered domain to it
Your DNS records from Step 2 stay in place — the panel links domain, webspace and mail together
Find your personal server details under E-mails → Server information in the customer area
Upload your website files or use the included tools, then test your site and mailboxes

Hosting runs in ISO 27001-certified datacenters in Germany — relevant if you need GDPR-friendly EU hosting. For questions, Checkdomain's support is reachable at support@checkdomain.de.

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

FAQ

How do I log in to Checkdomain webmail?

Open the Checkdomain webmailer in any browser (checkdomain.net/en/webmail, German interface via checkdomain.de) and sign in with your full email address as the username and your mailbox password. Webmail and IMAP/POP3 always share the same credentials.

What are the Checkdomain mail server settings?

IMAP: imap.udag.de, port 993 (SSL/TLS) · POP3: pop3.udag.de, port 995 (SSL/TLS) · SMTP: smtp.udag.de, port 465 (SSL) or 587 (STARTTLS). The username is always the complete email address. Your personal server details are also listed in the customer area under E-mails → Server information.

What is included in a Checkdomain hosting package?

Hosting packages bundle webspace, email mailboxes, traffic, spam and virus protection, and databases. Everything is managed in the same customer area as your domains and mailboxes; the datacenters are located in Germany and ISO 27001-certified.