1. Test sending and receiving email: Try sending a test email to an email address outside your server domain. If the email is delivered successfully and you receive a response, your SMTP server is likely working properly.
1. Check SMTP connection: Use the telnet command to connect to your SMTP server on port 25. If you receive a greeting message, such as “220 smtp.example.com ESMTP”, your SMTP server is working.
1. Verify Firewall: Make sure that the firewall or antivirus software isn’t blocking SMTP traffic.
1. Check DNS records: Make sure that your DNS records contain the correct information for your SMTP server.
1. Check Logs: Check your SMTP server logs for error messages or failed delivery attempts.
If you’re still experiencing issues, you may want to contact your email service provider or IT department for further assistance.
