📄 Article
✓ Link checked
Free
Beginner
Why we picked it Postmark is an email delivery company, so this is a working list from people who watch inboxes for a living, not a generic checklist. It walks through the concrete, boring reasons emails get flagged: missing authentication, no plain text version, shortened links, no unsubscribe link, and mismatched subject lines and content. Good first stop before you touch any DNS record.
13 reasons why your emails go into the spam folder (and what you can do about it)
From Postmark
- Missing SPF or DKIM is one of the fastest ways to get flagged as spam
- Always send a plain text version alongside HTML, spammers often skip it
- Avoid URL shorteners and use full, branded links instead
