Re: against this spam mail...

[ha...@t-online.de]

>> Jeff Chan wrote:
>> > On Wednesday, May 18, 2005, 12:05:13 AM, Monty Ree wrote:
>> > 
>> >>Hello, all.
>> > 
>> > 
>> >>When I see maillog, I can see lots of logs like below..
>> >>Some spammer send spam mails from aaaa@xxxx.com to zzzz@xxxx.com, I guess.
>> >>So mail server load is high to accept this spam and reply with"User 
>> >>unknown".
>> > 
>> > 
>> >>Is there any good way or solution against thess series spam?
>> > 
>> > 
>> >>Thanks in advance.
>> > 
>> > 
>> >>May 18 15:11:04 mail02 sendmail[22487]: j4I6B4i22487: <ho...@xxxxx.com>... 
>> >>User unknown
>> >>May 18 15:11:04 mail02 sendmail[22490]: j4I6B4i22490: <da...@xxxxx.com>... 
>> >>User unknown
>> >>May 18 15:11:04 mail02 sendmail[22493]: j4I6B4i22493: <da...@xxxxx.com>... 
>> >>User unknown
>> >>May 18 15:11:04 mail02 sendmail[22494]: j4I6B4i22494: <ja...@xxxxx.com>... 
>> >>User unknown
>> >>May 18 15:11:05 mail02 sendmail[22498]: j4I6B5i22498: <jo...@xxxxx.com>... 
>> >>User unknown
>> >>May 18 15:11:05 mail02 sendmail[22515]: j4I6B5i22515: <to...@xxxxx.com>... 
>> >>User unknown
>> >>May 18 15:11:05 mail02 sendmail[22516]: j4I6B5i22516: <jo...@xxxxx.com>... 
>> >>User unknown
>> >>May 18 15:11:06 mail02 sendmail[22525]: j4I6B6i22525: <sa...@xxxxx.com>... 
>> >>User unknown
>> > 
>> > 
>> > This is called a "dictionary attack".  If you search for that and
>> > sendmail, you may find some answers.  It's not specifically a
>> > SpamAssassin question.
>> > 
>> > Jeff C.
>> 
>> What I do for these kinds of e-mails is just block them at the sendmail 
>> level. If you're using FC2 (paths on other OS's may vary), just add a 
>> line like this in /etc/mail/access:
>> 
>> xxxxx.com			REJECT
>> 
>> This file is to allow relay access to domains. If you block out 
>> xxxxx.com, these messages will be rejected at the sendmail level.
>> 
>> Saurabh.
>> 

Hi,

I am dreaming of (or actually working on) something so that excessive undeliverables
from the same sender will automatically route further wrong addresses to the bit bucket

Wolfgang Hamann