Postfix on BSD

[Bart Silverstrim]

On Jun 16, 2005, at 1:25 PM, Ean Kingston wrote:

> On June 16, 2005 12:06 pm, Bart Silverstrim wrote:
>> On Jun 16, 2005, at 12:00 PM, Ean Kingston wrote:
>>> On June 16, 2005 11:54 am, Bart Silverstrim wrote:
>>>> Probably off-topic, but it's a sysadmin question that maybe someone 
>>>> on
>>>> the list could send a quick blurb answer about :-/
>>>>
>>>> I'm trying to filter some mail coming into Postfix based on the body
>>>> content.  I have the line
>>>>
>>>> body_checks = regexp:/usr/local/etc/postfix/body_checks
>>>>
>>>> in main.cf.  The file contains:
>>>> ********
>>>> # Will this stop RR collateral damage messages?
>>>> /^* This e-mail was sent from a Road Runner IP address. As part of 
>>>> our
>>>> continuing initiative to stop the spread of malicious viruses, Road
>>>> Runner scans all outbound e-mail attachments./       REJECT Possible
>>>> automated RoadRunner mail scanning collateral damage. Eliminate the
>>>> notifying text and resend message.
>>>>
>>>> # Borrowed check lines
>>>> /^This e-mail, in its original form, contained one or more attached
>>>> files that were infected with a virus, worm,/ REJECT Email reporting
>>>> virus detected
>>>> /^This e-mail in its original form contained one or more attached
>>>> files
>>>> that were infected with the / REJECT Email reporting virus detected
>>>> **********
>>>>
>>>> The files are owned root, wheel with rwrr, so it should be readable 
>>>> by
>>>> the postfix processes.  I do a "postfix reload", send an email from
>>>> the
>>>> Internet to this mail server containing the key phrase(s), and they
>>>> seem to go right through!  Am I missing something?
>>>
>>> Yes you are missing something. Postfix does not do multi-line
>>> expression
>>> matching.
>>
>> Maybe I'm misunderstanding you, but the lines wrapped in the email and
>> are one line each in the actual configuration file.
>
> Postfix scans the body of the email message one line at a time. Your
> expressions have  more text that would usually go on a  single line in 
> an
> email.

I'm sorry, you're right.  I tested using telnet to the SMTP server and 
it flagged it; something with my MTA or MUA was wrapping the lines.  I 
didn't know if you meant the lines were too long in the body_checks or 
in the raw source of the message.

Thanks,
-Bart