From: Brian Evans - Postfix List (grknightscent-team.com)
Date: Thu Jun 04 2009 - 11:20:37 CDT

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Brian Evans - Postfix List wrote:
> Ignacio Garcia wrote:
>
>> Hi there.
>>
>> We have a couple of servers handling thousands of messages a day. We
>> noticed that some of our users will use their autheticated account to
>> send messages from other valid accounts not sitting in our servers. By
>> using smtpd_reject_unlisted_sender = yes we solve the problem partially
>> by not letting users to use an incorrect local email account to send
>> messages. However, is there a way to prevent local authenticated users
>> sending email with valid hotmail or gmail accounts through our smtp
>> servers? We cannot use reject_authenticated_sender_login_mismatch since
>> some of our business customers have their own intranet email servers
>> doing smtp authenticated relays.
>>
>>
>
> You can separate them by using a check_sender_access.
> Expand or modify to fit your needs
>
> Example using pcre table:
> smtpd_sender_restrictions=
> ...
> check_sender_access pcre:/etc/postfix/auth_senders_check
> ...
>
> /etc/postfix/auth_senders_check:
>
> /^.*bizcustomer1.example.com$/ DUNNO
> /^.*bizcustomer2.example.com$/ DUNNO
> /^/ reject_authenticated_sender_login_mismatch
>
should be:

/^.*bizcustomer1\.example\.com$/ DUNNO
/^.*bizcustomer2\.example\.com$/ DUNNO
/^/ reject_authenticated_sender_login_mismatch

bad escaping.

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]