Fw: Telnet not authenticating

2012-05-31 Thread Andreas.B
- Original Message - From: Masoumeh Izadi iz...@iranet.ir To: postfix-users@postfix.org Sent: Wednesday, May 30, 2012 1:14 PM Subject: Telnet not authenticating Hi; We have a postfix Email server . when someone telnet to port 25 on our server, it is possible to send email from any

Telnet not authenticating

2012-05-30 Thread Masoumeh Izadi
Hi; We have a postfix Email server . when someone telnet to port 25 on our server, it is possible to send email from any ID user1@ anydomain to any user2@ mydomain telnet x.x.x.x 25 ehlo localhost mail from:user@anydomain sender OK rcpt to: user@mydomain recipient OK The question

Re: Telnet not authenticating

2012-05-30 Thread Ralf Hildebrandt
* Masoumeh Izadi iz...@iranet.ir: Hi; We have a postfix Email server . when someone telnet to port 25 on our server, it is possible to send email from any ID user1@ anydomain to any user2@ mydomain Yes, just like I can send you an email. How am I supposed to authenticate against your

Re: Telnet not authenticating

2012-05-30 Thread Larry Stone
On May 30, 2012, at 6:14 AM, Masoumeh Izadi wrote: We have a postfix Email server . when someone telnet to port 25 on our server, it is possible to send email from any ID user1@anydomain to any user2@mydomain When an SMTP client connects to port 25 of your server, it is also possible to