When emails are delivered to a spam or junk folder, it means the receiving mail server does not fully trust the message.
This can happen even if the email is technically delivered successfully.

Spam filtering is controlled by the receiving provider, not by ProRedLine.

Common Reasons Emails Go to Spam #

Emails may be marked as spam due to:

• Missing or incorrect SPF, DKIM or DMARC records
• New or low-reputation domains
• Suspicious email content
• Sending large volumes of email
• Forwarding through external providers

Multiple factors are usually involved.

Check Email Authentication First #

Correct authentication is essential.

Verify that:

• SPF record exists and is correct
• DKIM is enabled and valid
• DMARC record is present

These can be checked in cPanel under Email Deliverability.

Content-Related Causes #

Email content may trigger spam filters if it:

• Uses misleading subject lines
• Contains excessive links or images
• Includes spam-like keywords
• Uses poor formatting or HTML errors

Simple and clear messages are more trusted.

Sender Reputation and History #

New domains:

• Have no sending reputation
• Are more likely to be filtered initially

Reputation improves over time with:

• Consistent sending
• Low complaint rates
• Proper authentication

This process cannot be rushed.

Forwarding and Spam Filtering #

Forwarded emails:

• Are more likely to be marked as spam
• May fail SPF checks at the final destination

Direct delivery is always more reliable than forwarding.

Recipient-Side Filtering #

Spam decisions are made by:

• Gmail
• Outlook
• Yahoo
• Other providers

ProRedLine cannot override recipient spam filters.

What You Can Do #

To improve delivery:

• Verify SPF, DKIM and DMARC
• Avoid bulk sending
• Use clear sender information
• Ask recipients to mark emails as not spam
• Avoid forwarding when possible

Consistency matters more than volume.

What You Should Not Do #

Do not:

• Remove authentication records
• Repeatedly resend failed messages
• Send test emails in bulk
• Change DNS records too frequently

These actions can worsen reputation.

Testing and Monitoring #

After changes:

• Allow time for DNS propagation
• Send test emails to different providers
• Monitor feedback over several days

Immediate results are unlikely.

Responsibility Notice #

You are responsible for:

• Email content
• Sending behavior
• Maintaining authentication records

ProRedLine does not guarantee inbox placement.