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Introduction

This error occurs when attempting to send email through JetEmail’s SMTP servers without having our required SPF record properly configured in your domain’s DNS settings.

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Example Error Message

Here’s what this error looks like: 
[email protected]
   host relay.jetsmtp.net [103.173.0.0]
   SMTP error from remote mail server after end of data:
   550 [SPF_INVALID] Blocked. See https://reports.jetsmtp.net/?id=000000000000000000&auth=smtpuser

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What is SPF?

SPF (Sender Policy Framework) is an email authentication method that helps prevent email spoofing. It specifies which mail servers are authorized to send email on behalf of your domain.

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How to Fix This Error

  1. Log into your domain’s DNS settings
  2. Add JetEmail’s SPF record to your domain’s DNS records
  3. The record should look like: 
    v=spf1 include:spf.jetemail.com ~all
  4. If you already have an SPF record, add our include statement: 
    include:spf.jetemail.com
For more detailed instructions, see our SPF configuration guide.

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Verification

After adding the SPF record:
  • Allow up to 24 hours for DNS propagation
  • You can verify the record is correct using our SPF checker tool
  • Try sending your email again once DNS has updated