What causes SMTP error?
What causes SMTP error?
SMTP error messages help you understand why a message wasn’t sent successfully. If incoming or outgoing messages are bouncing, check the bounce messages for an SMTP error code that can help you diagnose the problem….Common SMTP 500 error codes.
| Error code | Description |
|---|---|
| 541 | Message rejected by the recipient address |
How do I troubleshoot SMTP relay problems?
Solution
- Check the SMTP server settings. SMTP server address—Check the host name or network address of the SMTP e-mail server.
- Check the SMTP authentication settings. Check whether the e-mail server requires authentication.
- Test SMTP settings by sending a test e-mail. If you are unable to send a test e-mail:
What is error type SMTP?
If there is a communication error, you will receive an SMTP error code — a message that indicates the specific problem; like the end of server communication which is error code 550 (The request failed).
How do I test my SMTP connection?
In this article
- What do you need to know before you begin?
- Step 1: Install the Telnet Client on your computer.
- Step 2: Find the FQDN or IP address of the destination SMTP server.
- Step 3: Use Telnet on Port 25 to test SMTP communication.
- Step 4: Success and error messages in the Telnet Session.
Is SMTP relay safe?
What Is SMTP Relay? In simple terms, what is SMTP relay means is an SMTP relay is a process of transferring an email from one server to another over the Internet. The SMTP servers are protected by usernames and passwords to avoid unauthorized use.
How do I debug SMTP connection?
Resolution
- Enter the following (replace mail.example.com with the server address of GWIA or SMTP agent): openssl s_client -CApath /etc/ssl/certs/ -starttls smtp -connect mail.example.com:25.
- To verify if it is working properly, see how the SMTP agent responds to the following command: ehlo.
What port does SMTP use?
Port 587: The standard secure SMTP port Modern email servers use port 587 for the secure submission of email for delivery. For example, if you use an email client software like Outlook or Apple Mail, it most likely is configured to use this port to send your messages.
