My emails are marked as spam by other providers. What should I do?

If your emails are landing in the spam or junk folder, it’s because the receiving servers’ anti-spam filters are detecting some suspicious or untrustworthy behavior in your messages.

Here I’ll explain why this can happen and what you can do to avoid it, with clear and easy-to-apply tips if you have your hosting with miHosting.com.

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📩 Why are my emails going to spam?

When you send an email and it ends up in the recipient’s spam folder, it can be due to several technical and reputation-related factors. Below I’ll walk through the most common ones and how to fix them.

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🚫 1. You’re using a new domain with no reputation

When a domain is new, email providers (like Gmail, Outlook, etc.) don’t know it yet, so they’re stricter when classifying its messages. 📌 Solution: Use your email normally and avoid suspicious behavior during the first few weeks. Reputation is built over time.

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📛 2. Your domain has been flagged for spam in the past

If you’ve ever sent bulk or promotional emails without permission, or been reported by users, your domain ends up on blacklists. That causes your legitimate emails to go to spam too.

📌 Solution: Avoid sending spam and correct any previous mistakes. If your website was compromised, change your passwords and make sure it’s updated and free of malware.

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🔒 3. Your email isn’t properly authenticated (DKIM and SPF)

The DKIM and SPF records help destination servers verify that you’re a legitimate sender. If they aren’t configured correctly, your emails lose credibility.

📌 Solution: From your control panel (DirectAdmin or cPanel), make sure these records are active in your domain’s DNS. 👉 At miHosting.com, you can follow this explanatory video to set them up correctly.

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🧠 4. You use suspicious words or formats

Anti-spam filters detect certain words or formats as warning signs. Avoid the following:

• Words like “free,” “viagra,” “urgent,” “click here,” “offer”
• Excessive use of capital letters, exclamation marks (!!!), or flashy colors
• Emails with no subject line or with only an image as content
• Very empty phrases like “hi” or “this is a test”

📌 Solution: Write emails with clear, formal, and professional content. Always include a descriptive subject line.

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🖥️ 5. Your device might have viruses or trojans

If your device is infected, it may be sending emails automatically without you noticing. This harms the reputation of your domain and your IP.

📌 Solution: Scan your device with an up-to-date antivirus and avoid sending emails from compromised devices.

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📎 6. Poorly managed attachments

Sending attachments without context, in uncommon formats, or uncompressed also raises suspicion.

📌 Solution: Send files compressed (.zip or .rar) and always accompany them with clear text explaining what they contain.

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🤝 7. Your recipients don’t know you

If your recipients don’t have you in their contacts list or have never interacted with you, it’s more likely your email will go to spam.

📌 Solution: Ask your contacts to add your email address to their address book. That improves your future deliverability.

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✅ Final recommendations to avoid spam

• Use your email responsibly and professionally
• Keep your website and plugins up to date
• Use strong passwords and change them frequently
• Enable DKIM and SPF on your domain
• Write messages with useful, well-structured content
• Verify your domain using tools like Mail Tester to analyze your sending score