Enter the text as shown in Bold in the example command box below, hitting Enter at the end of each line. For each successful command you issue, the server a return the message.
telnet smtp.123-reg.co.uk 25
220 mail6.atlas.pipex.net ESMTP Exim 4.71 - "ATLAS SMTP Service" Wed, 13 Jul 201 1 10:47:06 +0100
250-mail6.atlas.pipex.net Hello hns01-fw.internal.gxn.net [184.108.40.206]
250-AUTH PLAIN LOGINbr />
cwtui3lAcmlja2ljaeFoYewuY2 (Base 64 encoded username)
YeGjc3ducmE (Base 64 encoded password)
235 Authentication succeeded
MAIL FROM: email@example.com
RCPT TO: firstname.lastname@example.org
354 Enter message, ending with "." on a line by itself
Subject Test using Telnet
250 OK id=4Qgw3m-023484q-I5
This test will indicate whether or not you are able to connect successfully to send email from your e-mail account and if you see the statement OK it means the that the email message was sent to the recipient.
If you are able to connect successfully using telnet and send a email, but not through your regular e-mail client, this suggests the issue may be caused by your local software and you should re-check account settings in your e-mail client in accordance with the vendors help documentation and our e-mail support pages.