On 10/8/2014 1:41 PM, Brian wrote: > On Wed 08 Oct 2014 at 13:00:46 -0400, Jerry Stuckle wrote: > >> On 10/8/2014 7:55 AM, Brian wrote: >>> >>> By definition an MTA will transport mail. It will do this for whatever >>> talks nicely to it (telnet or netcat would do). Exim has no idea whether >>> it is communicating with an MUA or an MTA and doesn't care. In fact, it >>> will happily listen on ports 25 and 587 at the same time. >>> >>> Mail submitted on either of these ports can require authentication or be >>> restricted to being allowed only from designated networks, such as a LAN. >>> Neither of these mechanisms is known to lead to an inherent insecurity. >> >> Yes, I know all of that, Brian. But you missed the entire meaning of >> the word "smarthost" as it applies to MTAs. > > Nope. A smarthost *is* an MTA. My ISP has one; I have one; both talk to > netcat in fluent SMTP. >
That was the whole point of my post above. >> And yes, there are many possible insecurities in an MTA configuration. > > Indeed. Just as there are many ways to get run over crossing a busy road. > The trick is to avoid it happening. > Which is not as easy to do as some people claim. >> Does the term "open relay" mean anything? > > I thought you knew what one is. Please see my other posts in this thread. > > Jerry -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/54358740.9000...@attglobal.net