On 2/7/2012 7:38 AM, Rachid Abdelkhalak wrote: > > Hello Postfix users, > > It is possible to tell to postfix to stop accept sending mails from > SMTP commands executed from a telnet server 25 ?
No, it's not possible[1], and not desirable. But I really would like to know why you ask. Did you read some article that suggested this? Did some security audit flag this as a vulnerability? [1] careful packet timing analysis (outside of postfix) might allow you to "guess" that a session is hand-typed, but blocking that gains you nothing since there are many command line tools that would easily fool such analysis. -- Noel Jones
