Hi all I have a question ,I configured my e-mail server to only accept local e-mail, and deny other relay , however im still vulnerable to spam. My question is how do the ips block other e-mail going to their smtp Do they do it by access-list? Allowing only the local network with port 25? Or just the e-mail server? If cisco routers have to be involved does anyone have some links. Im behind a pix and would like to allow only my network to use smtp.
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