Yes, go to a command line prompt of your one of your proxies and do the following. Where the bold is what you would need to type in.
telnet 10.10.10.10 25 (this would be the same IP as you have in your email configuration)
Connected to 10.10.10.10.
Escape character is '^]'.
220 testemail.acme.com Mailing Service Academy, V.0 ready at Tue, 13 Dec 2011 10:02:26 -0800
250 testemail.acme.com Mailing Service Academ Hello [10.10.10.10]
MAIL FROM: email@example.com
250 2.1.0 firstname.lastname@example.org....SenderOK
RCPT TO: email@example.com
250 2.1.5 firstname.lastname@example.org
354 Start mail input; end with <CRLF>.<CRLF>
test email from a web proxy
250 2.6.0 <dfadsfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdfasdf>Queued mail for delivery
Thank you very much. Indeed this is the best way to verify that SMTP is working properly. There is no "Test Email" button yet :-(
Thanks..... We figured out the issue, it was with the HELO name