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Frequently asked questions

  • I am looking for a domain name registrant. Where can I look it up?

    The Whois is an easy-to-use tool for checking the availability of a .nl domain name. If the domain name is already taken, you can see who has registered it.

    On the page looking up a domain name you will find more information about what a domain name is, how the Whois works and how the privacy of personal data is protected. Alternatively, you can go straight to look for a domain name via the Whois.

  • I would like to transfer my domain name to another registrar. What is the procedure?

    To get your domain name transferred, you need the token (unique ID number) for your domain name. Your existing registrar has the token and is obliged to give it to you within five days, if you ask for it. The procedure for changing your registrar is described on the page transferring your domain name.

  • The details registered about me/my company are incorrect or out of date. How can I get them updated?

    To update the contact details associated with your domain name, you need to contact your registrar. Read more about updating contact details.

  • Why is my domain name in quarantine?

    When a domain name is cancelled, we aren't told the reason, so we can't tell you. You'll need to ask your registrar. The advantage of quarantine is that, if a name's cancelled by mistake, you can always get it back.

    One common reason is that the contract between you and your registrar says you've got to renew the registration every year. If you haven't set up automatic renewal and you don't renew manually, the registration will expire.

  • Ik heb een klacht over mijn provider/registrar. Kan ik daarvoor bij SIDN terecht?

    Wanneer je een klacht hebt over of een geschil met je registrar dan zijn er verschillende mogelijkheden om tot een oplossing te komen. Hierover lees je meer op pagina klacht over registrar. SIDN heeft geen formele klachtenprocedure voor het behandelen van een klacht over jouw registrar.

  • What conditions do I have to meet as a registrar?

    Would you like to be able to register domain names for customers or for your own organisation by dealing directly with SIDN? If so, you can become a .nl registrar. Read more about the conditions and how to apply for registrar status on the page becoming a registrar.

More frequently asked questions

XS4ALL enables DANE validation for outgoing mail

  • Monday 10 December 2018

XS4ALL has recently enabled DANE validation for all outgoing mail. That means that, before delivering each message, the company's outgoing mail server (smtp.xs4all.nl) will check whether the recipient's domain has a TLSA record for mail. If it does, the hash in the TLSA record will be used to validate the TLS server certificate on the receiving mail server (MX gateway). As well as cryptographically pinning the server certificate using the DNSSEC infrastructure, the procedure will prevent a downgrade attack on the SMTP STARTTLS capability.

Soft fail

Until now, XS4ALL's mail server has been in soft-fail mode: the Cloudmark Gateway has been configured so that, in the event of a DANE validation error, the e-mail message concerned is re-presented a few seconds later and the validation procedure dispensed with.

"Within a few weeks, we hope to be able to change the setting to a hard fail, says system manager Jan-Pieter Cornet. We've collected about two months' worth of log files. The errors recorded in the logs are mainly DNSSEC errors (e.g. rare NSEC records, the unauthorised use of CNAMES in MX records, and problems with wildcard records) and issues with DANE itself (records that don't match the certificate). The problems appear to be associated with a handful of hosters, so we'll have to talk to them."

DANE for client domains

Cornet expects DANE for mail to really take off in the period ahead. DANE for web will probably take longer to get established, because of resistance from the CAs, who see it as a threat to their revenue streams.

"Fortunately, DANE is on the Forum for Standardisation's 'use-or-explain' list (and DANE for outgoing mail will probably be added soon). Clients often mention the 'use-or-explain' list when they ask us about DANE. If we have enough interest to make a business case for enabling DANE for client domains, we may implement DANE in our client interface in the future."