Le 20/07/2011 22:15, Peter Tselios a écrit : > Well, since I plan to move into the Postfix wagon, from scratch, I want to > learn more about the 587 port submission and the blockage of port 25 for > that. What are the best practices on the matter? Are there any documents on > that? Soren how do you implement it? > P. >
The new standard recommends using port 587 (now called "submission") for mail submission, instead of overloading port 25. it is recommended that submission access requires authentication. thus sasl (well, ip based auth is acceptable for some time if you can guarantee that it's ok). now, given the auth mechanisms that are supported by MUAs, the one that works is PLAIN. in which case, TLS is receommended.
