Why Did My Email Go to Spam? Deliverability Answers.

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1. Domain reputation: How mailbox providers (MBPs) view your sending domain and IP addresses “Content: What your message contains and how your subscriber has reacted to it in the past” If you’re struggling to solve the latest deliverability mystery for your email marketing program, you’re not alone.

   In Content-based spam filtering

2. Spam filters aren’t just catching scammers—they’re catching you. With one in six real emails never making it to the inbox, you’ll need to pay attention to your infrastructure, sender reputation, and subscriber engagement. “Making it hard to unsubscribe doesn’t keep people on your list; it pushes them to hit “mark as spam.”” Relevant, personalized emails are your best defense against spam filters. Strong deliverability comes from sending emails people actually want to receive. That means smart segmentation, clean lists, and thoughtful personalization. Engagement is the ultimate inbox pass.

   In Content-based spam filtering

3. Spam filters aren’t just catching scammers—they’re catching you. With one in six real emails never making it to the inbox, you’ll need to pay attention to your infrastructure, sender reputation, and subscriber engagement. “One-click unsubscribe isn’t optional anymore” Relevant, personalized emails are your best defense against spam filters. Strong deliverability comes from sending emails people actually want to receive. That means smart segmentation, clean lists, and thoughtful personalization. Engagement is the ultimate inbox pass.

   In Content-based spam filtering

4. Check this list first, then read on for how to fix them. “Authentication protocols communicate to MBPs that the email coming in is from a legitimate sender.” 8 steps to prevent emails from going to spam

   In Content-based spam filtering

5. Check this list first, then read on for how to fix them. “Most major MBPs require authentication protocols to be in place for bulk senders.” 8 steps to prevent emails from going to spam

   In Content-based spam filtering

6. Check this list first, then read on for how to fix them. “Check DKIM, SPF, and DMARC records to ensure all are correctly set up.” 8 steps to prevent emails from going to spam

   In Content-based spam filtering

7. Land in inboxes, not spam folders “See deliverability problems before they cost you with real-time placement testing, reputation monitoring, and authentication checks in your workflow.” A non-exhaustive list of why your marketing emails are going to spam

   In Content-based spam filtering

8. Key takeaways ✨ “you’ll need to pay attention to your infrastructure, sender reputation, and subscriber engagement.” Respect the unsubscribe—or pay for it with spam complaints. Making it hard to unsubscribe doesn’t keep people on your list; it pushes them to hit “mark as spam.” One-click unsubscribe isn’t optional anymore, and it’s far less damaging to lose a subscriber than to rack up spam complaints.

   In Content-based spam filtering

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