What is Error 553?
Error 553 occurs when the email address used in the "From" field is invalid or not allowed by the recipient’s server. This often happens due to:
- An incorrectly formatted or non-existent email address in the "From" field.
- A mismatch between the email server and the domain sending the email.
- Missing or improperly configured DNS records, such as SPF.
How to Fix Error 553?
Follow these steps to resolve and prevent this error:
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Check the "From" Address:
- Ensure the email address in the "From" field is valid and correctly formatted.
- Verify that the email address exists and is associated with the sending domain.
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Authenticate Your Domain:
- Set up an SPF (Sender Policy Framework) record in your domain's DNS settings to authorize your server for sending emails.
- Ensure that the server's IP address matches the domain listed in the SPF record.
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Check the Recipient's Server Policies:
- Some servers block emails from free email providers (e.g., Gmail, Yahoo) when used in the "From" field.
- Consider using an email address associated with your domain instead of a generic provider.
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Contact the Recipient's Email Provider:
- If you suspect the issue lies with the recipient's server policies, contact their email provider for clarification.
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Use a Professional Email Service:
- Consider using a reliable email marketing platform like Mailpro to avoid misconfiguration and ensure proper domain authentication.
Preventing Error 553 in the Future
- Regularly verify and update your DNS records (SPF, DKIM, and DMARC).
- Ensure all sender email addresses are valid and properly formatted.
- Avoid using free email services in the "From" field for professional communications.
- Monitor your email server logs for any recurring issues and address them promptly.
By following these steps, you can resolve Error 553 and maintain smooth email communication. If you encounter persistent issues, consider consulting with your email provider for additional assistance.
List of Common SMTP Errors