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Re: Can I keep users from receiving mail from the Internet?



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Fedora wrote:

|I'm using sendmail as the MTA and I would like to make it impossible for
|certain users (root comes to mind, but there are other userids as
well) to
|receive email from the Internet.
|
|I'd like to "block" it, as opposed to having some sort of filter throw it
|away after it's arrived.  Ideally, these few userids would appear to be
|invalid to anyone outside my network.
|
|On the other hand ... I do need for all users to be able to receive email
|"internally" (i.e., from localhost).
|
|In my case, spammers have discovered that there is <gasp!> a "root" user
|that they can send email to.
|
|Any thoughts?
|
|Thanks much,
|Charlie
|
Charlie,

If you want to block ALL Internet email from coming in. Look into
setting up iptables to only accept SMTP connections from your local IP
network and block any other requests.
Retrieving mail is the job of IMAP and POP3, not SMTP, so I'm also a
little confused.

James Kosin
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