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 [EMAIL PROTECTED] to [EMAIL PROTECTED], 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: <[EMAIL PROTECTED]>... > User unknown > May 18 15:11:04 mail02 sendmail[22490]: j4I6B4i22490: <[EMAIL PROTECTED]>... > User unknown > May 18 15:11:04 mail02 sendmail[22493]: j4I6B4i22493: <[EMAIL PROTECTED]>... > User unknown > May 18 15:11:04 mail02 sendmail[22494]: j4I6B4i22494: <[EMAIL PROTECTED]>... > User unknown > May 18 15:11:05 mail02 sendmail[22498]: j4I6B5i22498: <[EMAIL PROTECTED]>... > User unknown > May 18 15:11:05 mail02 sendmail[22515]: j4I6B5i22515: <[EMAIL PROTECTED]>... > User unknown > May 18 15:11:05 mail02 sendmail[22516]: j4I6B5i22516: <[EMAIL PROTECTED]>... > User unknown > May 18 15:11:06 mail02 sendmail[22525]: j4I6B6i22525: <[EMAIL PROTECTED]>... > 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. -- Jeff Chan mailto:[EMAIL PROTECTED] http://www.surbl.org/
