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
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