Postmark keeps landing in spam for me

If Postmark emails are landing in spam, it’s usually one of a few things: authentication, sending reputation, content, or recipient-side filtering.

Here’s a practical checklist:

1) Verify authentication

Make sure your sending domain has:

• SPF set correctly
• DKIM enabled and passing
• DMARC added, even if it’s just p=none to start

If you use a custom domain in Postmark, confirm the DNS records exactly match what Postmark gives you.

2) Check your “From” domain

Use a domain you control in the From address, not a free mailbox like Gmail/Yahoo.
Best practice:

• hello@yourdomain.com
• news@yourdomain.com

3) Improve sender reputation

If you’re on a shared IP or have a low-volume new domain:

• warm up sending gradually
• send only to engaged users first
• avoid sudden volume spikes

4) Review content

Spam filters hate:

• too many links
• image-only emails
• spammy words like “FREE!!!”, “ACT NOW”
• broken HTML
• mismatched link domains
• attachments when unnecessary

5) Make sure recipients want the email

If people don’t open/click/delete your mail, mailbox providers may start sending it to spam.

• only email opted-in users
• remove inactive recipients
• include a visible unsubscribe link

6) Check Postmark activity and bounce data

Look at:

• delivery status
• spam complaints
• bounce reasons
• whether the issue is only with Gmail, Outlook, etc.

7) Test with spam-check tools

Send a test to:

• Gmail
• Outlook
• Yahoo
• seed addresses And run the message through a spam testing tool like Mail-Tester or GlockApps.

8) If it’s a single provider issue

If only Gmail/Outlook is spamming you, the problem may be:

• domain reputation
• poor engagement
• missing DMARC alignment
• suspicious links or tracking domains

If you want, I can help you diagnose it step by step.
Paste:

1. your sending domain setup,
2. a sample email header, or
3. the content of one email,
   and I’ll tell you what’s most likely causing the spam placement.