How do I verify a domain?

Domain Verification will allow you to send from any email address on a particular domain. For example, once you have verified, you can send emails using the Postmark platform with any email address. This feature is especially useful if you send from a large amount of email addresses in a single domain or send email on behalf of your customers.

Adding and Verifying a New Domain

Log into Postmark and navigate to the Sender Signatures tab. Click ‘Add New Domain or Signature’ 
Click ‘Add & Verify Domain’
Type in the domain you are adding, and click ‘Verify this domain’.
You will then see generated DKIM and SPF records that need to be added to your DNS in order to verify the domain. 
Add the DKIM and SPF records as type TXT to your DNS, with the Host/Domain/TXT Values that were generated. Once the DKIM record is added, we will check for it in your DNS every five minutes. It can take up to 48 hours for the DNS changes to propagate, so it can be a little while before DKIM shows as verified in Postmark. 
Once the SPF record is added to your DNS, click the Verify button to verify SPF. Once both the DKIM and SPF records are verified, you can immediately begin sending from any email address on the domain.
After DKIM and SPF are verified, you will also see a green checkmark next to the domain in your Sender Signatures.

Add Domain Verification for an Existing Sender Signature

If you have already verified SPF and DKIM for a Sender Signature and the DKIM record is unique for your account (the domain and DKIM record is not shared across multiple Postmark accounts), the domain will be verified automatically. More information about how Domain Verification affects existing Sender Signatures can also be found in our blog post about domain verification.
Navigate to your Sender Signatures tab. Under the domain you are adding Domain Verification for, click ‘Authenticate this domain’.
A DKIM record will be generated to be added to your DNS.
Adding the DKIM record will not affect any DNS records already in place, nor affect sending from the domain using a method other than Postmark.  
If you had previously verified SPF, no changes to your SPF are needed to verify the domain. Once you have verified SPF and DKIM for the domain, you are all set to begin sending from any email address on the domain.
Last updated September 15th, 2016

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