How to Remove X-headers
Julian Field
MailScanner at ecs.soton.ac.uk
Sun Mar 15 13:36:13 GMT 2009
I have found and fixed that bug. Missed out a $pos++ in a loop exit
condition.
Please try 4.75.9-2.
Cheers,
Jules.
On 13/3/09 13:05, Glenn wrote:
> Julian - Thanks very much for adding this functionality. I tried upgrading
> our Red Hat EL4/Postfix machines, and the new version stopped mail flow
> altogether. I have gone back to the older version (4.73.4-2) until I can
> figure out what went wrong. -Glenn.
>
>
> ---------- Original Message -----------
> From: Julian Field<MailScanner at ecs.soton.ac.uk>
> To: MailScanner discussion<mailscanner at lists.mailscanner.info>
> Sent: Thu, 12 Mar 2009 15:39:40 +0000
> Subject: Re: How to Remove X-headers
>
>
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> On the basis that sounds fairly sensible and appears to provide the
>> flexibility people are after, I have written and released it as 4.75.9.
>>
>> There is new text near the start of the description of "Remove These
>> Headers" which says this:
>>
>> # This is a space-separated list of a mixture of any combination of
>> # 1. Names of headers, optionally ending with a ':'
>> # (the ':' will be added if not supplied)
>> # 2. Regular expressions starting and ending with a '/'.
>> # These regular expressions are matched against the entire header line,
>> # not just the name of the header.
>> # **NOTE** The regular expressions must *not* contain spaces,
>> # so use '\s' instead of ' '.
>>
>> It appears to work fine in sendmail, I would be grateful if people
>> using other mailers could also test it for me.
>>
>> Thanks guys,
>> Jules.
>>
>> On 12/3/09 15:17, Julian Field wrote:
>>
>>> * PGP Signed: 03/12/09 at 15:18:00
>>>
>>> Okay, no problem.
>>> The new functionality will still take a list of header names or
>>> regexps. The regexps mustn't contain spaces or I can't parse them, so
>>> use \s when you mean a space.
>>> Header names can optionally end in a ':', it will be added if not
>>> supplied.
>>> Header names can optionally be of the form /regular-expression/ in
>>> which case this will be applied to the whole header line (including
>>> the name and value of the header of course). The test will be appled
>>> in a case-insensitive manner.
>>>
>>> Is that what people want?
>>>
>>> Jules.
>>>
>>> On 12/3/09 14:58, Glenn wrote:
>>>
>>>> Julian - Yes, I tried X-Mime.* and it does not work.
>>>>
>>>> It seems the X-header limit in Microsoft Exchange is just now
>>>> beginning to
>>>> cause problems. There is already a commercial fix for Exchange 2007
>>>> (http://www.codeplex.com/HeaderFilterAgent), but of course we are using
>>>> Exchange 2003. So you have at least one "people" who could put this
>>>> functionality to use, and probably others will be looking for it soon.
>>>> Thanks. -Glenn.
>>>>
>>>>
>>>> ---------- Original Message -----------
>>>> From: Julian Field<MailScanner at ecs.soton.ac.uk>
>>>> To: MailScanner discussion<mailscanner at lists.mailscanner.info>
>>>> Sent: Thu, 12 Mar 2009 14:40:51 +0000
>>>> Subject: Re: How to Remove X-headers
>>>>
>>>>
>>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>>> Hash: SHA1
>>>>>
>>>>> Have just taken a look at the code.
>>>>> Have you tried something like this in your ruleset
>>>>>
>>>>> From: 10.11.12.13 X-Mime.*
>>>>>
>>>>> as I think that may well indeed work. It won't work in Exim, but may
>>>>> well work in the others.
>>>>> If people want this functionality put in properly so you could do
>>>>> something like
>>>>> From: 10.11.12.13 ^X-Mime.*
>>>>> to anchor it properly, then I could add this.
>>>>>
>>>>> Jules.
>>>>>
>>>>> On 12/3/09 14:22, Julian Field wrote:
>>>>>
>>>>>>> Old Signed: 03/12/09 at 14:22:04
>>>>>>>
>>>>>> No, you can't use a regular expression to define which headers you
>>>>>> want to remove, just a list of header names. I'm fairly sure the
>>>>>> documentation does not imply that you *can* use regexps here.
>>>>>>
>>>>>> On 12/3/09 14:14, Glenn wrote:
>>>>>>
>>>>>>> Oh, sorry, I did not read Joost's post carefully enough to see the
>>>>>>> difference
>>>>>>> between his expression and mine. However, I just tested his
>>>>>>> expression, /^X-
>>>>>>> Mime.*\:/ , and it doesn't work either. I am wondering if
>>>>>>> MailScanner can
>>>>>>> use Perl expressions in this ruleset? Thanks again. -Glenn.
>>>>>>>
>>>>>>> ---------- Original Message -----------
>>>>>>> From: "Glenn"<glenn at mail.txwes.edu>
>>>>>>> To: MailScanner discussion<mailscanner at lists.mailscanner.info>
>>>>>>> Sent: Thu, 12 Mar 2009 09:02:37 -0500
>>>>>>> Subject: Re: How to Remove X-headers
>>>>>>>
>>>>>>>
>>>>>>>> Thanks for all the attention, but I'm afraid I still have the same
>>>>>>>> problem. Regardless of the propriety of doing so, I would like to
>>>>>>>> be able to filter headers using the "Remove These Headers" ruleset,
>>>>>>>> and I can't get it to work with Perl regular expressions.
>>>>>>>> Joost's
>>>>>>>> post seems to confirm that I am using an expression that should
>>>>>>>> remove the X-MimeOLE: header, but it doesn't. Can anyone shed light
>>>>>>>> on this? Thanks. -Glenn.
>>>>>>>>
>>>>>>>> ---------- Original Message -----------
>>>>>>>> From: Joost Waversveld<joost at waversveld.nl>
>>>>>>>> To: MailScanner discussion<mailscanner at lists.mailscanner.info>
>>>>>>>> Sent: Thu, 12 Mar 2009 09:38:58 +0100
>>>>>>>> Subject: Re: How to Remove X-headers
>>>>>>>>
>>>>>>>>
>>>>>>>>> /^XMime.*\:/ would match XMime<something> (and not X-
>>>>>>>>> Mime<something>)
>>>>>>>>>
>>>>>>>>> The regular expression should be /^X-Mime.*\:/
>>>>>>>>>
>>>>>>>>> Best regards,
>>>>>>>>>
>>>>>>>>> Joost Waversveld
>>>>>>>>>
>>>>>>>>> Alex Broens wrote:
>>>>>>>>>
>>>>>>>>>> On 3/11/2009 10:50 PM, Glenn wrote:
>>>>>>>>>>
>>>>>>>>>>> We use MailScanner and Postfix on a mail gateway server and
>>>>>>>>>>> forward
>>>>>>>>>>> mail to an internal Microsoft Exchange 2003 server. Evidently,
>>>>>>>>>>> enough X-headers have accumulated in an Exchange database to
>>>>>>>>>>> cause a
>>>>>>>>>>> problem, so we need to remove X-headers before they are
>>>>>>>>>>> forwarded to
>>>>>>>>>>> the Exchange server.
>>>>>>>>>>>
>>>>>>>>>>> There is a line in MailScanner.conf that allows us to name
>>>>>>>>>>> whatever
>>>>>>>>>>> headers we want to remove ("Remove These Headers"), but this
>>>>>>>>>>> raises
>>>>>>>>>>> some questions. If we just blanket remove all X-headers,
>>>>>>>>>>> won't this
>>>>>>>>>>> defeat features of MailScanner that depend on MailScanner adding
>>>>>>>>>>> headers?
>>>>>>>>>>>
>>>>>>>>>>> According to hints in the MailScanner rules directory, we
>>>>>>>>>>> should be
>>>>>>>>>>> able to use regular Perl expresssions to create a ruleset to
>>>>>>>>>>> exclude
>>>>>>>>>>> certain headers from the delete list. My problem is that I don't
>>>>>>>>>>> have a clue how to write regular Perl expressions. From what
>>>>>>>>>>> I've
>>>>>>>>>>> read online, for example, the lines below should be
>>>>>>>>>>> equivalent, but
>>>>>>>>>>> when I use the Perl expression in the ruleset it doesn't work.
>>>>>>>>>>>
>>>>>>>>>>> From: [ipaddress] X-MimeOLE: ##this removes the X-MimeOLE
>>>>>>>>>>> header
>>>>>>>>>>>
>>>>>>>>>>> From: [ipaddress] /^XMime.*\:/ ##this doesn't
>>>>>>>>>>>
>>>>>>>>>>> I know this isn't a Perl forum, but I'm hoping that someone
>>>>>>>>>>> who has
>>>>>>>>>>> tried this can enlighten me. If I could just get a simple
>>>>>>>>>>> expression
>>>>>>>>>>> to work, I might be able to build what I need. Thanks. -Glenn.
>>>>>>>>>>>
>>>>>>>>>> Before you start breaking MIME headers, who told you this or
>>>>>>>>>> what MS
>>>>>>>>>> KB article covers this?
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Joost Waversveld
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> MailScanner mailing list
>>>>>>>>> mailscanner at lists.mailscanner.info
>>>>>>>>> http://lists.mailscanner.info/mailman/listinfo/mailscanner
>>>>>>>>>
>>>>>>>>> Before posting, read http://wiki.mailscanner.info/posting
>>>>>>>>>
>>>>>>>>> Support MailScanner development - buy the book off the website!
>>>>>>>>>
>>>>>>>> ------- End of Original Message -------
>>>>>>>>
>>>>>>>> --
>>>>>>>> MailScanner mailing list
>>>>>>>> mailscanner at lists.mailscanner.info
>>>>>>>> http://lists.mailscanner.info/mailman/listinfo/mailscanner
>>>>>>>>
>>>>>>>> Before posting, read http://wiki.mailscanner.info/posting
>>>>>>>>
>>>>>>>> Support MailScanner development - buy the book off the website!
>>>>>>>>
>>>>>>> ------- End of Original Message -------
>>>>>>>
>>>>>>>
>>>>>> Jules
>>>>>>
>>>>>>
>>>>> Jules
>>>>>
>>>>> - -- Julian Field MEng CITP CEng
>>>>> www.MailScanner.info
>>>>> Buy the MailScanner book at www.MailScanner.info/store
>>>>>
>>>>> Need help customising MailScanner?
>>>>> Contact me!
>>>>> Need help fixing or optimising your systems?
>>>>> Contact me!
>>>>> Need help getting you started solving new requirements from your
>>>>> boss? Contact me!
>>>>>
>>>>> PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654
>>>>>
>>>>> -----BEGIN PGP SIGNATURE-----
>>>>> Version: PGP Desktop 9.9.1 (Build 287)
>>>>> Comment: Use Enigmail to decrypt or check this message is legitimate
>>>>> Charset: ISO-8859-1
>>>>>
>>>>> wj8DBQFJuR71EfZZRxQVtlQRAjxQAKCWXxHnjDlgWXLyJM+w/5Xa8ljlZwCgiUZt
>>>>> pgTRow7Fqx83C5gTW0Kilco=
>>>>> =Iqy2
>>>>> -----END PGP SIGNATURE-----
>>>>>
>>>>> --
>>>>> This message has been scanned for viruses and
>>>>> dangerous content by MailScanner, and is
>>>>> believed to be clean.
>>>>>
>>>>> --
>>>>> MailScanner mailing list
>>>>> mailscanner at lists.mailscanner.info
>>>>> http://lists.mailscanner.info/mailman/listinfo/mailscanner
>>>>>
>>>>> Before posting, read http://wiki.mailscanner.info/posting
>>>>>
>>>>> Support MailScanner development - buy the book off the website!
>>>>>
>>>> ------- End of Original Message -------
>>>>
>>>>
>>> Jules
>>>
>>>
>> Jules
>>
>> - --
>> Julian Field MEng CITP CEng
>> www.MailScanner.info
>> Buy the MailScanner book at www.MailScanner.info/store
>>
>> Need help customising MailScanner?
>> Contact me!
>> Need help fixing or optimising your systems?
>> Contact me!
>> Need help getting you started solving new requirements from your
>> boss? Contact me!
>>
>> PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654
>>
>> -----BEGIN PGP SIGNATURE-----
>> Version: PGP Desktop 9.9.1 (Build 287)
>> Comment: Use Enigmail to decrypt or check this message is legitimate
>> Charset: ISO-8859-1
>>
>> wj8DBQFJuSy8EfZZRxQVtlQRArdmAKC05+diwhk2XuJoQ31gJASOjlX57QCcDcum
>> B2jdj/D1uqVV8JA87+T0kHM=
>> =p4ZI
>> -----END PGP SIGNATURE-----
>>
>> --
>> This message has been scanned for viruses and
>> dangerous content by MailScanner, and is
>> believed to be clean.
>>
>> --
>> MailScanner mailing list
>> mailscanner at lists.mailscanner.info
>> http://lists.mailscanner.info/mailman/listinfo/mailscanner
>>
>> Before posting, read http://wiki.mailscanner.info/posting
>>
>> Support MailScanner development - buy the book off the website!
>>
> ------- End of Original Message -------
>
>
Jules
--
Julian Field MEng CITP CEng
www.MailScanner.info
Buy the MailScanner book at www.MailScanner.info/store
MailScanner customisation, or any advanced system administration help?
Contact me at Jules at Jules.FM
PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654
PGP public key: http://www.jules.fm/julesfm.asc
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
More information about the MailScanner
mailing list