How to reject back-dated messages

I've been looking at the header_checks file and have put in a pair of lines
that reject messages with date strings that contain 19[0-9][0-9] and 20
[0-6]. There are two problems with this approach:

1) It has to be manually updated every year.

2) It does not reject messages from this year that are "old".

Is there a way to reject any message with a time stamp more than xxx (1
month, for example) old?


--
Bill Gee

There are no 'X' chars in my email address.

Am Mon, 03 Sep 2007 16:17:59 -0500 schrieb Bill Gee:

> Is there a way to reject any message with a time stamp more than xxx (1
> month, for example) old?

http://www.snertsoft.com/sendmail/milter-date/

Alexander

On 2007-09-03 23:17, Bill Gee wrote:
> I've been looking at the header_checks file and have put in a pair of lines
> that reject messages with date strings that contain 19[0-9][0-9] and 20
> [0-6]. There are two problems with this approach:
>
> 1) It has to be manually updated every year.
>
> 2) It does not reject messages from this year that are "old".
>
> Is there a way to reject any message with a time stamp more than xxx (1
> month, for example) old?
>
>

Maybe you can put:
/Date:.*200[0-6]/ wrong year
/Date:.*19[0-9][0-9]/ wrong year

in header_checks

well, start with "WARN wrong year" first,
and see if it works

/bb

On 2007-09-12 14:13, birre wrote:
> On 2007-09-03 23:17, Bill Gee wrote:
>> I've been looking at the header_checks file and have put in a pair of
>> lines
>> that reject messages with date strings that contain 19[0-9][0-9] and 20
>> [0-6]. There are two problems with this approach:
>>
>> 1) It has to be manually updated every year.
>>
>> 2) It does not reject messages from this year that are "old".
>>
>> Is there a way to reject any message with a time stamp more than xxx (1
>> month, for example) old?
>>
>>
>
> Maybe you can put:
> /Date:.*200[0-6]/ wrong year
> /Date:.*19[0-9][0-9]/ wrong year
>
> in header_checks
>
> well, start with "WARN wrong year" first,
> and see if it works
>
> /bb

Sorry, that should be:
/Date:.*200[0-6]/ REJECT wrong year
/Date:.*19[0-9][0-9]/ REJECT wrong year

I was a bit tired I guess :-)

/bb

In article <fcb5pq$7r2$1@news.al.sw.ericsson.se>, birre wrote:
>>
>> Maybe you can put:
>> /Date:.*200[0-6]/ wrong year
>> /Date:.*19[0-9][0-9]/ wrong year
>>
>> in header_checks
>>
>> well, start with "WARN wrong year" first,
>> and see if it works
>>
>> /bb
>
> Sorry, that should be:
> /Date:.*200[0-6]/ REJECT wrong year
> /Date:.*19[0-9][0-9]/ REJECT wrong year

Headers are just strings. Anchor the beginning of the line.
/^(Date:.* 200[0-6])/ REJECT Set your clock. $1 is way off.

And if you're in a mood for regular expressions, try this.


smtpd_client_restrictions =
...
check_client_access regexp:/etc/postfix/client-regex
...


/^((a?dsl|dhcp|dyn(amic)?|ppp)([.-][0-9]{1,3}){4}.*)$/ REJECT Sending from $1 won't work.
Use your ISP's SMTP server.


Cameron

Alexander Dalloz wrote:

> Am Mon, 03 Sep 2007 16:17:59 -0500 schrieb Bill Gee:
>
>> Is there a way to reject any message with a time stamp more than xxx (1
>> month, for example) old?
>
> http://www.snertsoft.com/sendmail/milter-date/
>
> Alexander


Hmmmm, Â*Interesting! Â*I'll check this out. Â*Thanks!

As it turns out, the bad dates I thought I was getting were not really from
1969. Â*They were truly invalid dates such as 34 August 2007. Â*KMail did
something funky and put them down as 1969 dates.



--
Bill Gee

There are no 'X' chars in my email address.