Comments on: Test mail server for an open relay

By: Amit

Amit — Thu, 05 May 2011 08:31:08 +0000

Hi,
use following
127.:allow,RELAYCLIENT=””
.:deny
and run
qmailctl cdb

Regards,
Amit

By: arfie

arfie — Thu, 01 Jul 2010 03:26:48 +0000

Hi,
Do you want to know how to make qmail mail server become close relay?
Because i think qmail is open relay so i often email from the spammers.
I have configured tcp.smtp file like this:

127.:allow,RELAYCLIENT=”"

but i still receive spam.

And when i follow your instruction the result is still open relay.

Thank you for your answer.

By: volkswagner

volkswagner — Fri, 08 Jan 2010 22:27:55 +0000

Sean, I tried to telnet relay-test.mail-abuse.org, but I did not see any automated results.

I performed the instruction set for open relay test and got access denied.

What should I get in response fro relay-test.mail-abuse.org?

By: fosiul

fosiul — Tue, 16 Sep 2008 15:21:51 +0000

check your IP here
http://cbl.abuseat.org/lookup.cgi

if your ip is listed here then it will be rejected by yahoo.

By: Abhishek Dey

Abhishek Dey — Thu, 29 May 2008 05:02:46 +0000

hi i m trying to build an email site….but i get a rejected mail message when i send mails to rediff and yahoo. but i succesffully sent mails to gmail server and cooltoad server(cooltoad.com).
Please can you tell me what could be the reason??

By: cc

cc — Thu, 17 Apr 2008 02:01:09 +0000

yes,i agree with,i don’t want get spam email too.great it’s useful for me.

By: gofirefox

gofirefox — Fri, 27 Oct 2006 17:38:16 +0000

Good information, now i know how to find out if it is open

thanks a lot

By: nixcraft

nixcraft — Fri, 27 Oct 2006 16:58:48 +0000

It is depend upon your MTA. For example postfix use following directives:

smtpd_recipient_restrictions =
permit_sasl_authenticated,
reject_unauth_destination,
permit_mynetworks,
reject_unknown_recipient_domain,
reject_rbl_client relays.ordb.org,
reject_rbl_client list.dsbl.org,
check_relay_domains,
permit

Sure you need to configure sasl authentication and maintain the list of virtual domains. Let me know your MTA name.

By: Czar

Czar — Fri, 27 Oct 2006 16:35:38 +0000

and if one would see “250 Accepted”… how does one stop an open relay

By: nixcraft

nixcraft — Fri, 27 Oct 2006 14:03:59 +0000

Sean,

Good finding.

Appreciate your post.

By: Sean

Sean — Fri, 27 Oct 2006 13:40:56 +0000

From your mail server, telnet to

relay-test.mail-abuse.org

It will do an extensive scan of your IP and immediately report the problems

Sean