Fwd: Re: Strange issues with my mailserver setup...

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Fwd: Re: Strange issues with my mailserver setup...

Dusty-11


-------- Original Message --------
Subject: Re: Strange issues with my mailserver setup...
Date: Fri, 27 Jun 2008 10:46:27 +0000
From: Dusty <[hidden email]>
To: mouss <[hidden email]>

Ok, I understand about the domain name triggering filters.  However I know that
there are other domains on the securityfocus list with similar names so I don't
think that is the cause.

In regards to the SAV, I have gone to that link and implemented the
smtp_sender_restrictions a long with creating a whitelist file with the
securityfocus.com domain in it:

root@stoned-hacker:/etc/postfix# cat sender_access
@securityfocus.com OK
@cloud9.net OK
@postfix.org OK
root@stoned-hacker:/etc/postfix#


Also in my main.cf I have:

smtpd_sender_restrictions = permit_mynetworks, check_sender_access
hash:/etc/postfix/sender_access, reject_unknown_sender_domain,warn_if_reject
reject_unverified_sender

i have postmap'd the sender_access file.

So I have it setup correctly, I don't understand what i'm doing wrong ?




On Fri, 27 Jun 2008 12:34:34 +0200, mouss <[hidden email]> wrote:

> Dusty wrote:
>> So let me get this straight, I need to turn sender verification off for
> domains
>> such as securityfocus.com to be able to recvieve their mail ?
>>
>
> Point your browser to
>     http://www.postfix.org/ADDRESS_VERIFICATION_README.html
> and search for "securityfocus".
>
> SAV is controversial (to say the least). many sites will blacklist you
> if you probe them (SAV looks like a dictionary attack).
>
> PS. You may also need to change your domain name as it can trigger
> filters ;-p
>
>> In order to do that I need to add:
>>
>> /etc/postfix/main.cf:
>>     smtpd_sender_restrictions =
>>         permit_mynetworks
>>         ...
>>         check_sender_access hash:/etc/postfix/sender_access
>>         reject_unknown_sender_domain
>>         warn_if_reject reject_unverified_sender
>>         ...
>>     # Postfix 2.6 and later.
>>     # unverified_sender_reject_reason = Address verification failed
>>
>>     # Note 1: Be sure to read the "Caching" section below!
>>     # Note 2: Avoid hash files here. Use btree instead.
>>     address_verify_map = btree:/var/lib/postfix/verify
>>
>> Then create the following:
>>
>> /etc/postfix/sender_access
>>     securityfocus.com OK
>>
>> And restart postfix ?
>>
>
> just reload.
>> Which I am guessing turns of sender verification off for
> securityfocus.com and
>> I can then recvieve list mail ?
>>

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Re: Fwd: Re: Strange issues with my mailserver setup...

mouss-2
Dusty wrote:

> -------- Original Message --------
> Subject: Re: Strange issues with my mailserver setup...
> Date: Fri, 27 Jun 2008 10:46:27 +0000
> From: Dusty <[hidden email]>
> To: mouss <[hidden email]>
>
> Ok, I understand about the domain name triggering filters.  However I know that
> there are other domains on the securityfocus list with similar names so I don't
> think that is the cause.
>
> In regards to the SAV, I have gone to that link and implemented the
> smtp_sender_restrictions a long with creating a whitelist file with the
> securityfocus.com domain in it:
>
> root@stoned-hacker:/etc/postfix# cat sender_access
> @securityfocus.com OK
> @cloud9.net OK
> @postfix.org OK
>  

wrong syntax. you apparently had the syntax right in another post.

disable SAV at once (comment out the warn_if_reject
reject_unverified_sender) and try again (try a new list. not one you
already tried).

> root@stoned-hacker:/etc/postfix#
>
>
> Also in my main.cf I have:
>
> smtpd_sender_restrictions = permit_mynetworks, check_sender_access
> hash:/etc/postfix/sender_access, reject_unknown_sender_domain,warn_if_reject
> reject_unverified_sender
>
> i have postmap'd the sender_access file.
>
> So I have it setup correctly, I don't understand what i'm doing wrong ?
>