[Mimedefang] smtp spoofing

2005-06-02 Thread Super-Dome
Dear ALL how can i disallow use of my domain from outside network using *From address of my domain . help needed ! Regards SD ___ Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list

Re: [Mimedefang] smtp spoofing

2005-06-02 Thread Ben Kamen
David F. Skoll wrote: Super-Dome wrote: how can i disallow use of my domain from outside network using *From address of my domain. You cannot. Really... hehehe... that's what SPF was for to a large extent... but since you can't FORCE ISP's and companies to hire admins instead of

Re: [Mimedefang] smtp spoofing

2005-06-02 Thread Matthew Schumacher
David F. Skoll wrote: Super-Dome wrote: how can i disallow use of my domain from outside network using *From address of my domain. You cannot. Regards, David. I have this running at one site: if((exists $SendmailMacros{md_tag} and $SendmailMacros{md_tag} eq 'authenticated') or

Re: [Mimedefang] smtp spoofing

2005-06-02 Thread Super-Dome
On Thu, 02 Jun 2005 13:11:16 -0400, David F. Skoll wrote Super-Dome wrote: how can i disallow use of my domain from outside network using *From address of my domain. You cannot. but is this possible if *TO address is for my domain ? Thanks SD

Re: [Mimedefang] smtp spoofing

2005-06-02 Thread David F. Skoll
Matthew Schumacher wrote: I have this running at one site: [...] This pretty much stops mail from our domain from being spoofed by users that don't authenticate, then I turn off relaying for everything that doesn't authenticate. Uh, no. You can't prevent me from pretending to be [EMAIL

RE: [Mimedefang] smtp spoofing

2005-06-02 Thread Matthew.van.Eerde
Super-Dome wrote: Dear ALL how can i disallow use of my domain from outside network using *From address of my domain . help needed ! Regards SD Hmmm... you've never used the Email this page to a friend feature of a website to send yourself an email? The SPF and Sender ID standards

Re: [Mimedefang] smtp spoofing

2005-06-02 Thread Alberto da Silva
On 6/2/05, Super-Dome [EMAIL PROTECTED] wrote: Dear ALL how can i disallow use of my domain from outside network using *From address of my domain . help needed ! Regards SD This works well for me: /etc/mail/access From:worldcall.net.pk ERROR:5.7.1:550 From domain

Re: [Mimedefang] smtp spoofing

2005-06-02 Thread Matthew Schumacher
David F. Skoll wrote: You can't prevent me from pretending to be [EMAIL PROTECTED] and e-mailing to [EMAIL PROTECTED] or [EMAIL PROTECTED]. Oh, I thought we was talking about excepting spoofed messages from his own domain. I didn't realize he was talking about other systems excepting spoofed