How to Validate that You Control a Domain for an SSL Certificate¶
For security reasons, it is necessary to verify that you have the full agreement of the domain’s owner to issue an SSL certificate for the domain.
If you have requested an SSL certificate for a domain that you don’t control you will not be able to validate the certificate automatically. During the creation of the certificate , you will be offered three validation methods you can use after you submit your CSR.
Validation by DNS record implies that you have access to the DNS record management of your domain (whether or not at Gandi), and can add a CNAME record to it.
If you opt for this method, you will need to add a special CNAME record to your domain’s DNS zone records. You will receive instructions on how to do this when you complete your order.
If you are purchasing an SSL certificate for a domain for which you are already a contact, this method is chosen for you automatically, and your DNS records updated automatically for you. In the event that you chose a multi-domain certificate, you must have the rights to all the domains present in the certificate for this validation method to work.
If you have created a previous certificate for this domain, you may end up with conflicting DNS zone records, which will prevent the validation of your domain. To avoid this, delete any previous records that were created for other certificate validations.
To validate by email, an email is sent to the email address “email@example.com” where example.com is replaced with your domain name. This validation method is simple, though it requires that you have a specific email address available for each domain to be validated. Of all the validation methods, validation by email is the fastest.
Because the email is sent when you complete your order, it is best if you can create this email before you complete your order. If you do not create the email address in time, you can resend the email on the page for your new certificate in the “SSL Certificates” section of your account after you have setup the email address.
You can learn how to create an email address on your domain name on our documentation page for creating email addresses.
It is also possible to create an alias which will forward email sent to your admin email address to another existing account. However, be aware that forwarded email addresses are often marked as spam and so we recommend not using an alias to avoid the risk of your validation email being marked as spam.
This method can only use email addresses that start with “admin.” You cannot validate your domain by sending an email to any other address.
You have 30 days to confirm by email, after which the operation will time out.
This validation method requires that you have access to the web server that hosts the website that the domain will point to.
You are asked to copy a TXT file that contains a verification key, and to place it at the following location on your domain. You will replace
www.example.com with the domain you want to secure, and replace
filename with the name of the file you are provided.
We recommend that you check that the file is available online, preferably outside your corporate network and only in HTTP.
Beware of CMS installations (such as Wordpress, for example) which can block access to any “off-site” file.
Sectigo will verify the file within 1 hour of the launch of the validation process.