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Date:      Mon, 8 Sep 2008 05:38:18 -0700 (PDT)
From:      lyd mc <alydiomc@yahoo.com>
To:        freebsd-questions@freebsd.org
Subject:   Sendmail become open relay
Message-ID:  <907677.98158.qm@web52202.mail.re2.yahoo.com>

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Hi guys need help..

My mailserver become an open relay.

Unknown user can now send mail.

snippet from mailq

m88C8iWq042874      689 Mon Sep  8 20:08 <osxch@mail.mydomain.com>
                 (Deferred: Name server: mx1.mail.tw.yahoo.com.: host name loo)
                                         <chenaa00@yahoo.com.tw>
                                         <chena0.tw@yahoo.com.tw>
                                         <chena0877@yahoo.com.tw>
                                         <chena0@yahoo.com.tw>
                                         <chena11@yahoo.com.tw>
                                         <chena121959330@yahoo.com.tw>
                                         <chena1238@yahoo.com.tw>
                                         <chena186890@yahoo.com.tw>
                                         <chena1966@yahoo.com.tw>
                                         <chena20155@yahoo.com.tw>
                                         <chena226@yahoo.com.tw>
                                         <chena22@yahoo.com.tw>
                                         <chena26232000@yahoo.com.tw>

I don't  have user 'osxch' and there others can also send..


best regars thnx

alydio







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