Domain Verification will allow you to send from any email address on a particular domain. For example, once you have verified
mydomain.com, you can send emails using the Postmark platform with any @mydomain.com 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 Domain or Signature’
Click ‘Add Domain’
Type in the domain you are adding, and click ‘Verify Domain’.
You will then see a generated DKIM record that needs to be added to your DNS in order to verify the domain.
Add the DKIM record as type TXT to your DNS, with the Hostname and Value that is shown. Once the DKIM record is added to your DNS, click
Verify. 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. After DKIM is verified, you can immediately begin sending from any email address on the domain.
After DKIM is 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 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.
Navigate to your Sender Signatures tab. Under the domain you are adding Domain Verification for, click ‘Add a DKIM DNS record’.
A DKIM record will be generated to be added to your DNS.
Adding the DKIM record to the domain's DNS will not affect any other DNS records already in place, nor affect sending from the domain using a method other than Postmark.
Once you have verified DKIM for the domain, you are all set to begin sending from any email address on the domain. Optionally, you can also
add a custom Return-Path
to help ensure effective delivery. Adding a Return-Path is not required for verifying the domain, however.