550 mail relay not permitted g suite email not sending

The infamous "550 Mail relay not permitted" error!

This error typically occurs when your G Suite email account is trying to send an email, but the receiving mail server is blocking the email because it thinks your account is not authorized to relay mail.

Here are some common causes and solutions to help you resolve the issue:

Causes:

  1. Incorrect DNS settings: Your DNS settings might not be configured correctly, which can cause issues with mail relaying.
  2. Missing or incorrect SPF record: A Sender Policy Framework (SPF) record helps prevent spam by specifying which mail servers are authorized to send emails on behalf of your domain. If your SPF record is missing or incorrect, it can cause mail relaying issues.
  3. Missing or incorrect DKIM record: DomainKeys Identified Mail (DKIM) is a digital signature that verifies the authenticity of an email. If your DKIM record is missing or incorrect, it can cause mail relaying issues.
  4. G Suite account settings: Your G Suite account might have some settings that are preventing mail relaying.

Solutions:

  1. Check your DNS settings: Ensure that your DNS settings are correct and up-to-date. You can use a tool like DNSChecker to check your DNS settings.
  2. Verify your SPF record: Check your SPF record and ensure it's correct and up-to-date. You can use a tool like SPF Checker to verify your SPF record.
  3. Verify your DKIM record: Check your DKIM record and ensure it's correct and up-to-date. You can use a tool like DKIM Checker to verify your DKIM record.
  4. Check your G Suite account settings: Log in to your G Suite account and check the following settings:
    • Domain settings: Ensure that your domain is set up correctly and that the "Allow less secure apps" setting is enabled.
    • Mail settings: Ensure that your mail settings are correct and that the "Allow relaying" setting is enabled.
  5. Contact your DNS provider: If you're using a third-party DNS provider, contact them to ensure that your DNS settings are correct and up-to-date.
  6. Contact G Suite support: If none of the above solutions work, contact G Suite support for further assistance.

Additional tips:

I hope these solutions help you resolve the "550 Mail relay not permitted" error and get your G Suite email sending again!