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[6.301] Problem with Expression Filter

Hi,
I have a problem with the expression filter:

I have entered the expression: user1.+\@domain\.com
(means adress user1X@domain.com  is blocked). This Works!

Now if I write an email with two addresses in the TO field
(e.g. user1@domain.com and user2@domain.com)

I get that user 1 is blacklisted???

Here is the SMTP Log:
2006:08:03-08:53:13 (none) exim[32486]: [35\38]   X-OriginalArrivalTime: 03 Aug 2006 06:53:11.0290 (UTC) FILETIME=[7C1265A0:01C6B6C9]
2006:08:03-08:53:13 (none) exim[32486]: [36\38]   X-LOC-Local-RCPT: user1@domain.com
2006:08:03-08:53:13 (none) exim[32486]: [37\38]   X-LOC-Local-RCPT: user2@domain.com
2006:08:03-08:53:13 (none) exim[32486]: [38/38]   X-Regex-Match: user1.+\@domain\.com (blacklisted)

Anyone an Idea [:S]

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0 Frank_H over 19 years ago

Hi,

Im not sure what you want to change... [:S]

But yes that is true if any thing matches then its trigged. If you try to send from ONLY user2 then it will not be blacklisted.

Also have a look at this site
http://www.regular-expressions.info/reference.html
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0 SveN_01 over 19 years ago in reply to Frank_H

Hi,
I think you did not get me right:

I have the following expression:
user1.+\@domain\.com

This should block following addresses (any
char or chars are added after the name):
user1a@domain.com
user1aa@domain.com
user1aaa@domain.com
user1b@domain.com
user1bb@domain.com
...

It should let pass following address:
user1@domain.com

If I write a single email to user1@domain.com is NOT blocked. Thats okay!

But if I write a single email to user1@domain.com and to user2@domain.com
(both in the TO Field) ASL says that user1@domain.com is blocked, but it shouldn't

cu SveN
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0 Frank_H over 19 years ago in reply to SveN_01

Hi,

Sounds like it triggers if you have anything not only user2 after the first user. Have you tried with anything else like testuser@domain.com as number 2?
Just to eliminate if he triggers on anything as number 2.

If that is the case later that he triggers on anything i think its more a bug then an error from your script.
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0 Gert Hansen over 19 years ago in reply to Frank_H

Hi there all,

the ASG Content Filter does mathing over multiple lines.

This means that the expression: user1.+\@domain\.com

is a little bit greedy.

if you apply it to
2006:08:03-08:53:13 (none) exim[32486]: [36\38] X-LOC-Local-RCPT: [noparse]user1@domain.com[/noparse]
2006:08:03-08:53:13 (none) exim[32486]: [37\38] X-LOC-Local-RCPT: [noparse]user2@domain.com[/noparse]
2006:08:03-08:53:13 (none) exim[32486]: [38/38] X-Regex-Match: user1.+\@domain\.com (blacklisted)

the following part is matched
2006:08:03-08:53:13 (none) exim[32486]: [36\38] X-LOC-Local-RCPT: user1@domain.com
2006:08:03-08:53:13 (none) exim[32486]: [37\38] X-LOC-Local-RCPT: [noparse]user2@domain.com[/noparse]
2006:08:03-08:53:13 (none) exim[32486]: [38/38] X-Regex-Match: user1.+\@domain\.com (blacklisted)

because the '.+' matches also the line break.

just try this regexp instead:
user1[^@]+\@domain\.com

[^@] means a character class witt all charactes except '@'.

regards
Gert
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0 SveN_01 over 19 years ago in reply to Gert Hansen

Hi Gert,
thanks for the reply. Now it's clear why the message got blocked. Maybe this
should be updated in the documentation?

For me it was not clear against which part of the email the Regular Expression is used. The help says: "The Expression Filter can be used to filter mails based on the presence of byte strings in the body of the mail." Now you tell that the regex is used against the log.... ???

cu SveN
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0 SveN_01 over 19 years ago in reply to Gert Hansen

Hi Gert,
thanks for the reply. Now it's clear why the message got blocked. Maybe this
should be updated in the documentation?

For me it was not clear against which part of the email the Regular Expression is used. The help says: "The Expression Filter can be used to filter mails based on the presence of byte strings in the body of the mail." Now you tell that the regex is used against the log.... ???

cu SveN
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