📮 Connect Postmark

Postmark has the strongest inbox reputation of the services on the Sending screen. It keeps that reputation by being careful about who its customers mail, so it suits a list of people who really asked to hear from you.

What you need before you start:

• A Postmark account (sign up at postmarkapp.com).
• Access to the DNS for your sending domain.
• A list of people who opted in recently enough to remember you.

Where to find it:

In ResultsAiX Mailer open Delivery, then Sending, click + Add Sender and choose Postmark in the Provider dropdown. Its five step checklist and the Server Token box appear.

Step 1. Verify your domain at Postmark:

1. In your Postmark account, add your sending domain under Sender Signatures.
2. Add the DKIM and Return-Path records Postmark gives you at your DNS host.
3. Wait for both to show as verified.

Step 2. Copy a Server API token:

In Postmark, open the server you want to send through, then its API Tokens tab, and copy the Server API token. The token belongs to that server.

Step 3. Fill in the form:

The Postmark part of the form has one box.

• Server Token: the Server API token from step 2, shown as dots.

Then fill in the rest of the form:

• Display name: for example Postmark (broadcast stream).
• From name and From email: an address on the verified domain, for example Anna at Leafwise and anna@yoursite.com.
• Reply-To: for example hello@yoursite.com.
• Daily limit (0 = unlimited): your plan's allowance for a day.
• Priority (lower = preferred): 10 if Postmark is your main service, or 30 if it shares the load.
• Active: leave it ticked.

Click Save Sender, then click Test on the new row.

Which message stream it uses:

Postmark keeps transactional email (receipts, password resets) and bulk email (newsletters) in separate message streams. The Mailer sends through the stream saved with the connection. The form has no box for the stream, so a new connection sends through the server's default stream, which Postmark calls outbound.

The plugin's own checklist suggests creating a Broadcast message stream for list email. Postmark's Activity view shows which stream each test arrived in, so you can see exactly where your mail is going.

Step 4. Set up the webhook:

1. On the Sending screen, click Copy URL next to Postmark in the Bounce & complaint webhook box.
2. In Postmark, open the server's message stream, then its webhooks, and add the URL.
3. Switch on the Bounce, Spam Complaint and Subscription Change events.

Postmark names each bounce type, and the Mailer uses it: hard bounces are suppressed, soft ones are logged. Spam complaints are suppressed, and a subscription change that stops sending marks the person as unsubscribed.

How Postmark and the Mailer work together:

• The Mailer switches off Postmark's own open and link tracking on every email, because it tracks opens and clicks itself.
• Postmark reviews accounts that bounce heavily, so the first send matters most. Clean the list first and switch on warmup.

A real example:

Leafwise Gardening uses Postmark for part of its newsletter. Anna verified yoursite.com in Sender Signatures, copied the Server API token, and saved a connection called Postmark (broadcast stream) with Daily limit 10,000 and Priority 30. Rotation gives it a 20 share of each send, so today it carried 96 emails while SES and SMTP2GO carried the rest.

Tips:

• Run Verify Leads over any list older than a few months before its first send through Postmark.
• Keep transactional email, such as shop receipts, on a different Postmark server from your newsletter.
• Keep the unsubscribe link visible. The Mailer adds a one-click unsubscribe to every email.
• See Deliverability: SPF, DKIM And DMARC to check your records.

If something does not look right:

• If the test fails and mentions the sender signature, use a From email on the verified domain, or verify that exact address in Postmark.
• If the test fails with a token message, copy the Server API token again from the right server and paste it with no spaces.
• If Postmark pauses the account after a send, reply to their review, then clean the list with Verify Leads before sending again.
• If mail is not in the stream you expected, open Postmark's Activity view to see the stream each email used.