If you experience problems regarding copyright issues on a Danish site or need to find country codes, mail headers or rbl lists, you can find the relevant page below.

• Best practice for mailing lists
• Feedback loop
• Contact
• Does the mailaddress exist?
• Response time
• Webmail functions
• Internet Country Codes (sorted by Country Code)
• Internet Country Codes (sorted by Country)
• RBL
• How to find the mail-header
• Copyright