How to Set Up SPF for Postmark

Authorize Postmark to send transactional email on behalf of your domain by adding the correct SPF include.

Quick Answer — The Record You Need

Record Type

TXT

Host / Name

Value

v=spf1 include:spf.mtasv.net ~all

Add include:spf.mtasv.net to your existing SPF record. mtasv.net is Postmark's mail infrastructure domain.

Step-by-Step Setup

Log in to Postmark

Go to account.postmarkapp.com and sign in.

Add your sending domain

Navigate to Sender Signatures or Domains. Add your domain and Postmark will display the required DNS records.

Check your existing SPF record

Look up your current SPF record.

dig TXT yourdomain.com +short | grep spf

Add Postmark to your SPF record

Add include:spf.mtasv.net to your existing SPF record.

v=spf1 include:spf.mtasv.net ~all

Verify in Postmark

Click "Verify" in Postmark. The platform will confirm your DNS records are correct.

Before & After

Before

v=spf1 include:_spf.google.com ~all

After

v=spf1 include:_spf.google.com include:spf.mtasv.net ~all

Common Gotchas

The correct include is spf.mtasv.net. The mtasv.net domain is Postmark's infrastructure domain (Message Transfer Agent Service).
Postmark also supports a Return-Path domain (custom bounce domain) which provides SPF alignment for DMARC.
If you set up a custom Return-Path domain, the SPF record should be on that subdomain rather than your root domain.

Verify Your Setup

After adding your DNS records, use our free SPF checker to verify everything is configured correctly. DNS changes typically propagate within minutes, but can take up to 48 hours.

Frequently Asked Questions

What SPF record do I need for Postmark?

Add include:spf.mtasv.net to your SPF record. For example: v=spf1 include:spf.mtasv.net ~all.

What is spf.mtasv.net?

spf.mtasv.net is Postmark's SPF include domain. MTASV stands for Message Transfer Agent Service, which is Postmark's sending infrastructure.

Does Postmark support a custom Return-Path for SPF alignment?

Yes. Postmark allows you to set a custom Return-Path domain (bounce domain), which helps achieve SPF alignment for DMARC.