Sending a test email using Telnet can be useful when diagnosing email delivery issues.
- Open a Command Prompt window
- Type telnet exserver 25, and then press Enter
- Type HELO, and then press Enter.
- Type MAIL FROM: This email address is being protected from spambots. You need JavaScript enabled to view it. , and then press Enter.
- Type RCPT TO: This email address is being protected from spambots. You need JavaScript enabled to view it.
- Type DATA, and then press Enter.
- Type Subject: Test email, and then press Enter.
- Press Enter again. A blank line is needed between the Subject: field and the message body.
- Type Testing, and then press Enter.
- Type a period ( . ), and then press Enter.
- To disconnect from the SMTP server, type QUIT, and then press Enter.
- To close the Telnet session, type quit, and then press Enter.
Here's what a successfull session using the steps above looks like:
C:\>telnet exserver 25
220 EXSERVER.exchange2016demo.com Microsoft ESMTP MAIL Service ready at Thu, 22
Oct 2015 11:39:23 +1000
helo
250 EXSERVER.exchange2016demo.com Hello [192.168.0.30]
mail from:
This email address is being protected from spambots. You need JavaScript enabled to view it.
250 2.1.0 Sender OK
rcpt to:
This email address is being protected from spambots. You need JavaScript enabled to view it.
250 2.1.5 Recipient OK
Data
354 Start mail input; end with .
Subject: Test email
Testing
.
250 2.6.0 <
This email address is being protected from spambots. You need JavaScript enabled to view it.
&;gt; [InternalId=854698491929, Hostname=EXSERVER.exchange2016demo.com] Queued mail for delivery
Other useful rescources are:
- Open Outlook, hold down the Ctrl key, right-click on the small Outlook icon near the time on Taskbar and select Test Email AutoConfiguration. Tests are self explanitory.
- Microsoft Remote Connectivity Analyzer
- How to install Telnet client
- Use Telnet to test SMTP communication on Exchange servers
Please contact Computer Doctor if you have any questions or need assistance.
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