SMTP Anonymous
Exchange 2003 SP1, GroupShield installed. Is there a way to tunr off anonymous client access to the SMTP viritual server? In otherwords to prevent from spammers to connect to it and send to local recipients, yet still receive email from other SMTP servers? Also see many junk in the log that is represented with etiher mydomain.com or the ip address of my mail server as the "client". Is there a way to specifically filter these? I have reverse dns lookup enabled. but it seem to be useless in these cases. Most of the junk that makes it trough IMF and GS uses this method. A<. A,.
AndyIzsak
exchange.admin
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On Thu, 30 Sep 2004 00:17:03 -0700, "Andy Izsak" <AndyIzsak@discussions.microsoft.com> wrote: >Exchange 2003 SP1, GroupShield installed. >Is there a way to tunr off anonymous client access to the SMTP viritual >server? >In otherwords to prevent from spammers to connect to it and send to local >recipients, yet still receive email from other SMTP servers? > >Also see many junk in the log that is represented with etiher mydomain.com >or the ip address of my mail server as the "client". >Is there a way to specifically filter these? >I have reverse dns lookup enabled. but it seem to be useless in these cases. >Most of the junk that makes it trough IMF and GS uses this method. > >A<. > >A,. If you remove the Anonymous access then no other smtp server that wasn't in your Exchange organisation could connect to it unless their Exchange servers had created a connector to you and you had given them credentials to access it. The anonymous has got nothing to do with preventing spam.
mark7219This is how SMTP works - if an outsider wants to send a message to your domain, the server will accept the message without any authentication. If this weren't true, you would not get any message. Try using a third party tool to tackle the spam problem. Here are some good tools. Spam Marshall (http://www.spammarshall.com) Sophos (http://www.sophos.com) BrightMail (http://www.brightmail.com) Regards. Andy Izsak wrote: > Exchange 2003 SP1, GroupShield installed. > Is there a way to tunr off anonymous client access to the SMTP viritual > server? > In otherwords to prevent from spammers to connect to it and send to local > recipients, yet still receive email from other SMTP servers? > > Also see many junk in the log that is represented with etiher mydomain.com > or the ip address of my mail server as the "client". > Is there a way to specifically filter these? > I have reverse dns lookup enabled. but it seem to be useless in these cases. > Most of the junk that makes it trough IMF and GS uses this method. > > A<. > > A,.
av1
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