550 5.7.1 relaying denied gmail

A common issue!

The error message "550 5.7.1 relaying denied" typically indicates that your email client or server is trying to send an email through Gmail's servers, but Gmail is blocking the relay (i.e., the email is not coming from the same IP address as the sender).

Here are some possible reasons and solutions:

  1. Gmail's IP address blocking: Gmail may be blocking your IP address due to suspicious activity or a high volume of emails being sent from that IP. Try checking your IP address on Google's IP address lookup tool to see if it's listed as a known spammer.
  2. Incorrect sender email address: Make sure that the sender email address is correct and matches the email address you're trying to send from. If the sender email address is not verified or is not a valid Gmail address, Gmail may block the relay.
  3. Incorrect authentication: Ensure that your email client or server is properly authenticated with Gmail. You may need to configure your email client to use OAuth 2.0 or set up a custom authentication mechanism.
  4. Relaying restrictions: Gmail has strict relaying restrictions to prevent spamming. If you're trying to send emails from a different domain or IP address, you may need to configure your email client or server to use a valid sender email address and IP address.
  5. Firewall or network issues: Check your firewall and network settings to ensure that they're not blocking the connection to Gmail's servers.

To resolve the issue, you can try the following:

  1. Check your email client settings: Verify that your email client is configured correctly, including the sender email address, password, and authentication settings.
  2. Use a valid sender email address: Ensure that the sender email address is a valid Gmail address and is verified.
  3. Configure relaying: If you're trying to send emails from a different domain or IP address, configure your email client or server to use a valid sender email address and IP address.
  4. Check your IP address: Verify that your IP address is not listed as a known spammer and is not blocked by Gmail.
  5. Contact your email provider: If you're still having issues, contact your email provider's support team for assistance with configuring your email client or server.