[Dshield] smtp test for open relay

Blanchard, Joe BLANCHAJ at bsci.com
Mon Jun 23 13:37:27 GMT 2003

Try telnet relay-test.mail-abuse.org 25

Without the 25 you'll be attempting a telnet session and
not a SMTP session.
After connecting, you'll need to spoof an SMTP transaction
using the traditional helo, mail from: , and rcpt to: 
followed by data then the content.


-----Original Message-----
From: Fred Grayson [mailto:fred at fred-grayson.net]
Sent: Monday, June 23, 2003 9:12 AM
To: list at dshield.org
Subject: [Dshield] smtp test for open relay

>Do you have links to ips web sites (or others) that test for open
>relays for an IP ?  I've got one to test and I don't know where to go.

If you have access to the machine running the mail server itself, you can
test it. Just run this from a shell:

telnet relay-test.mail-abuse.org

list mailing list
list at dshield.org
To change your subscription options (or unsubscribe), see:

More information about the list mailing list