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DNS/Mail Utilities:

DNS Stuff - A large collection of DNS utilties combined into one site. www.dnsstuff.com

Sam Spade - Dns tools and Blacklist Lookups. http://www.samspade.org/

DNS.net - Tools to manage DNS. http://www.dns.net/dnsrd/tools.html

Demon tools - Internet Tools http://www.demon.net/toolkit/internettools/

NW Tools - Ping / Traceroute / NSlookup/ etc http://network-tools.com/

MAIL / Webbased Relay Checkers

Abuse.net relay testing www.abuse.net/relay.html

Open Relay Database Test - ordb.org/submit/

Open Relay Test members.iinet.net.au/~remmie/relay/

Mail Server Relay Test -www.lucidlogic.com/relay.php

Anonymous Relay Test www.antispam-ufrj.pads.ufrj.br/test-relay.html

Anonymous Relay Test -www.aupads.org/test-relay.html

Test your mail server for an open relay www.truson.biz/services/spam_tester.php

Third Party Relay Check www.rbl.jp/svcheck.php

Mailserver Open Relay Check msv.dk/ms009.asp

SpamHelp.org SMTP Open Relay Test - www.spamhelp.org/shopenrelay/

Open Relay Test - www.lashampoo.net/unix/testrelay

Ted's Webtools - Open Relay Test http://www.mob.net/~ted/tools/relaytester.php3

MAIL / Telnet Relay Checkers

mrt - www.monkeys.com/mrt/

Perl rlytest - www.unicom.com/sw/rlytest/

Perl mtaprobe.exp - www.cymru.com/Tools/mtaprobe.exp

Expect SMTP Open Relay Checker - sourceforge.net/projects/smtprc

FreeBSD testrelay - www.kluge.net/~felicity/random/testrelay.txt

Perl relaytest - ftp://ftp.ruhr-uni-bochum.de/local/mail/spamtools/relaytest

Perl RelayTest - www.digiarch.org/relaytest.html

Win SORBS - sorbs.sourceforge.net/- checks incoming servers for open relays and proxies

Discussion and the format for relay tests

Relay Testing Envelopes -www.chebucto.ns.ca/~af380/envelopes.txt

Open Relay Verifying Engine Tests -www.aupads.org/working.html

Relay Testing Envelopes -www.ki.nu/software/sendmail/orbs-envelopes.shtml

Some open relay tests -www.reedmedia.net/misc/mail/open-relay.html
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