The consumer (Dialup,DSL,Cable, Wireless broadband,etc) internet is
slowly moving to this, with one minor exception:
Marc Perkel wrote:
If port 25 were blocked from consumers and they were forced to talk to
servers on port 587, even without authentication, then a server could
distinguish consumers from other servers. I think this kind of
configuration could be used to help isolate virus infected computers
from spamming and spreading.
587 should *always* be authenticated. In this way, it prevents unknown
users within your address space from using your email server to spew
spam. All mail that originates from a server configured in this way (25
is only for other mail servers, and cannot relay, 587 is always
authenticated, and permits relaying), can then be tracked back to the
original user to help eliminate spam at the source.
Most ISP's which implement the 25 block will open if the customer is
running their own mail server.
-forrest
- Re: Thoughts on Isolating Viruses - Port 587 Submissi... Forrest W. Christian
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