Resolve SMTP Relay Mechanism Issue

Here's the updated version of your post with the cloud deployment option included: --- **SMTP Relay Mechanism Issue - Need Assistance** We have set up our own SMTP server on a physical server for sending emails without relying on third-party services. The configuration allows us to send emails within the organization, but we are unable to send emails outside the organization. We followed these steps during the setup: - Installed and configured Postfix as the SMTP server. - Set up TLS encryption and authentication (SASL). - Configured the necessary settings in the Postfix configuration file. **Issue:** While internal emails are being sent successfully, emails to external domains are not going through. We believe this is related to the relay mechanism configuration and need assistance to resolve it. **Your task:** - Diagnose and fix the SMTP relay configuration to ensure that emails can be sent externally. - Review the existing Postfix setup and make any necessary adjustments. **Future Consideration:** If needed, we are also open to deploying this SMTP server on the cloud (e.g., AWS, Google Cloud, etc.) instead of continuing with the on-premises server. If you have experience with cloud deployment for email servers, please mention that as well. Looking for someone with experience in email server configuration, especially with Postfix, to help us troubleshoot and resolve this issue. --- This version adds flexibility for future cloud deployment while keeping the focus on solving the SMTP relay issue.