Very nice post, but ....
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Marc Funaro Sent: Wednesday, February 02, 2005 9:13 PM To: [email protected] Subject: RE: [IMail Forum] port-map running as a service In reply to my own post. I have successfully configured an application to run as a service to map port 587 to port 25. I provide instructions below to everyone on the list, <snipping out all but the bothersome part> ==================================== Since you're already in a telnet session, you might as well test to see if implementing port 587 mapping has made you an open relay in some way. Enter the following telnet commands one at a time: ==================================== ehlo mail from: [EMAIL PROTECTED] rcpt to: [EMAIL PROTECTED] (after submitting the "rcpt to" command you should get a 550 error. If it says "ok" and awaits DATA, then you are an open relay. Check to make sure your own iMail server's IP addresses are not in the "relay for addresses" list.) </snip> The spammers will spoof the FROM address. Your test should be: ehlo mail from: {your email address} rcpt to: [EMAIL PROTECTED] and it should fail. If it works, you must be misconfigured (or telnetting from a sacred IP). IMail should require AUTH. To test it working, you would want to use SMTP-AUTH. I don't know how with Telnet, but Outlook does so I've not looked<g>. Dan To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
