On 19/05/16 00:38, Wietse Venema wrote:
Wietse Venema:
A brief example:
/etc/postfix/sender_access:
example.comreject Sender address requires authentication
other.example reject Sender address requires authentication
Do "postmap /etc/postfix/sender_access", then add this
I will try to be more specific. Create an test account that can send emails
from postfix. Telnet on the postfix machine on port 25. Now send an email from
that test account to any other valid email on your domain. You will see that
you are allowed to do so without authentication. The whole world
Wietse Venema:
> A brief example:
>
> /etc/postfix/sender_access:
> example.com reject Sender address requires authentication
> other.example reject Sender address requires authentication
>
> Do "postmap /etc/postfix/sender_access", then add this to main.cf:
>
> smtpd_sender_re
A brief example:
/etc/postfix/sender_access:
example.com reject Sender address requires authentication
other.example reject Sender address requires authentication
Do "postmap /etc/postfix/sender_access", then add this to main.cf:
smtpd_sender_restrictions =
permit_mynet
On Wed, 18 May 2016 13:22:49 +0300
Catalin Badirca wrote:
> I've tried your suggestion and the issue remains. Someone could
> telnet into postfix and would be allowed to send mails from a valid
> address to another valid address in mydomain without authentication.
>
> Is there any way I can stop
If you do not accept submission on port 25, you could add a
sender_access map to the service on port 25
smtpd_sender_restrictions =
...
check_sender_access hash:/etc/postfix/sender_access
...
and in said file list your domains each with action "reject"
Am 18.05.2016 um 12:22 schrieb Catalin Bad
Thank you very much for your time and sorry for the long response time.
I've tried your suggestion and the issue remains. Someone could telnet into
postfix and would be allowed to send mails from a valid address to another
valid address in mydomain without authentication.
Is there any way I ca
On Mon, May 16, 2016 at 07:25:54PM +0300, Catalin Badirca wrote:
> I am breaking my head trying to solve the following thing. I have a
> Postfix server that accepts mail from $mydomain and delivers for
"From $mydomain" probably has nothing to do with it.
> standard $mydestination. I also have s
