Re: [exim] Reject on helo

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Autor: Dan_Mitton
Datum:  
To: Julio Feferman
CC: exim-users
Betreff: Re: [exim] Reject on helo
I'm kind of new at this too, but I think you need to wildlsearch or
nwildlsearch. See section 9.3 of the online manual:

http://www.exim.org/exim-html-4.66/doc/html/spec_html/ch09.html#SECTsinglekeylookups

Hope this helps.



Sent by:        exim-users-bounces@???
To:     exim-users@???
cc:      (bcc: Dan Mitton/YD/RWDOE)
Subject:        [exim] Reject on helo
LSN: Not Relevant
User Filed as: Not a Record


I am trying to reject a delivery based on the sender's helo name. I
get many concurrent connections where the helo consistently has the
same format (displaying a domain name for instance). So, I am
guessing these are mass mailing systems that don't bother altering
the helo.

I have smtp_accept_max_per_host = 5 to limit connections from the
same IP and still they insist by getting a different IP and using up
their five connections. Can`t see how this can be anything other than
spam. I could restrict the IP at acl connect but want to be less
strict in this case, so I set up a deny at acl helo as follows:

#       deny    message       = Your email has been rejected probably 
because your domain has been sending spam.
#       log_message   = HELO in reject_helo list
#       condition     = ${lookup {$sender_helo_name} \
#                               lsearch{/etc/exim/reject_helo} \
#                               {yes}{no}}


where /etc/exim/reject_helo contains, one per line: *baddomain1.com
*baddomain2.com, etc.

however, when I run a mock smtp connection with, for instance exim -
bh 192.168.11.22 and do EHLO baddomain1.com, I get

>>> deny: condition test failed
>>> processing "deny"
>>> check condition = ${lookup {$sender_helo_name} lsearch{/etc/exim/

reject_helo} {yes}{no}}
 >>>                 = no
 >>> deny: condition test failed


Is the condition set up properly, or am I approaching the issue in a
wrong way?

Thanks for the help.



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