Here's a complete interactive session between a telnet application (the

sending server being impersonated by the telnet program and a human) and

the receiving server. At the end, based on the response of the receiving

server, you could have a conditional branch to abort with a "thumbs up"

or "thumbs down" depending on the response.

By the way, you can duplicate this test from any computer workstation,

using telnet, although depending on the telnet OS and the receiving

server's email application, the dialog will vary some.

In the example, "telnet: >" is what the sender types, and "server:" is

the response from the receiver. (The "client:" is the sender's prompt,

after the connection has been established.)

telnet:> telnet mx1.example.com 25

telnet:Trying 192.0.2.2...

telnet:Connected to mx1.example.com.

telnet:Escape character is '^]'.

server:220 mx1.example.com ESMTP server ready Tue, 20 Jan 2004 22:33:36 +0200

client:HELO client.example.com

server:250 mx1.example.com

client:MAIL from: <sender@example.com>

server:250 Sender <sender@example.com> Ok

client:RCPT to: <recipient@example.com>

server:250 Recipient <recipient@example.com> Ok

You'll also need to know what port the receiving server uses...many

email servers no longer support the old smtp standard port 25, instead

using 587, or if they are forcing secure connections via SSL, 465 is common.

Mike

-------- Original Message --------

Subject: Re: [NF] Standard Email Sender Verification Procedures

From: Ken Dibble <krdibble@stny.rr.com>

To: profoxtech@leafe.com

Date: 4/29/2013 2:05 PM

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