MailServer - Test SMTP

Your best, easiest and most globally available tool: telnet or Windows CMD

1. At command prompt, type: telnet mail.mailserver.com 25
2. Type EHLO , and then press ENTER.

3. Type AUTH LOGIN. The server responds with an encrypted prompt for your user name.

   Enter your user name encrypted in base 64. You can use one of several tools that are available to encode your user name.

   The server responds with an encrypted base 64 prompt for your password. Enter your password encrypted in base 64.

4. Type MAIL FROM:, and then press ENTER. If the sender is not permitted to send mail, the SMTP server returns an error.

5. Type RCPT TO:,and then press ENTER.If the recipient is not a valid recipient or the server does not accept mail for this domain, the SMTP server returns an error.

6. Type DATA.

   If desired, type message text, press ENTER, type a period (.), and then press ENTER again.

   If mail is working properly, you should see a response similar to the following indicating that mail is queued for delivery:

   250 2.6.0 MAILID-SOMETHINGHERE@mail.somedomain.com.