Article

13 reasons why your emails go into the spam folder (and what you can do about it)

Postmark Free Beginner

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.

• 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