spam attack is increasing my smtp log file

nemerko
Posts: 5
Joined: Fri Dec 31, 2010 12:08 am

spam attack is increasing my smtp log file

Postby nemerko » Mon Jul 24, 2017 8:22 pm

I have a problem about some attack to my server since March 2017. They could not pass my security settings but still its a problem for me. I'm sharing SMTP log sample below this message. My all settings are correct and mail server working ok but still this attack killing my sources and increasing log file sizes in short time. How can I block this attack? have you any idea? Thanks in advance..

---log sample:---
07/24/17 00:00:00 ME-E0109: [1808] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:wagorpu@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:00 ME-E0109: [1132] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:roger6108@yahoo.com.tw] was denied for requesting IP Address 111.241.149.198
07/24/17 00:00:00 ME-E0109: [900] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:ming8825252@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:00 ME-E0109: [2468] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:4aad@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [1564] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:stwbra@yahoo.com.tw] was denied for requesting IP Address 1.160.112.210
07/24/17 00:00:00 ME-E0109: [2616] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:wife09190812@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [1708] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:bshiang@yahoo.com.tw] was denied for requesting IP Address 36.224.135.22
07/24/17 00:00:00 ME-E0109: [2908] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:wkaohsiung@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [1808] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:pspndsgamecubeps3@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:00 ME-E0109: [900] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:rw_pian@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:00 ME-E0109: [1132] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:scorpin_rain@yahoo.com.tw] was denied for requesting IP Address 111.241.149.198
07/24/17 00:00:00 ME-E0109: [2468] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:y567606@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [1564] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:ter256851@yahoo.com.tw] was denied for requesting IP Address 1.160.112.210
07/24/17 00:00:00 ME-E0109: [2616] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:67fe@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [2908] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:yellowcat_816@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [900] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:mingoying@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:00 ME-E0109: [1132] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:south_pole1020@yahoo.com.tw] was denied for requesting IP Address 111.241.149.198
07/24/17 00:00:00 ME-E0109: [2468] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:ivy66@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [1564] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:szyau_48.tw@yahoo.com.tw] was denied for requesting IP Address 1.160.112.210
07/24/17 00:00:00 ME-E0109: [2908] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:yuchihsheng@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-E0109: [2616] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:ychch615@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:00 ME-I0074: [1708] (Debug) End of conversation
07/24/17 00:00:01 ME-E0109: [2840] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:cancer19880716@yahoo.com.tw] was denied for requesting IP Address 36.224.135.22
07/24/17 00:00:01 ME-E0109: [1132] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:sackingx@yahoo.com.tw] was denied for requesting IP Address 111.241.149.198
07/24/17 00:00:01 ME-E0109: [2468] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:zoo921030@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:01 ME-E0109: [900] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:mimycenjunichi@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:01 ME-E0109: [1564] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:tqmbthok@yahoo.com.tw] was denied for requesting IP Address 1.160.112.210
07/24/17 00:00:01 ME-E0109: [2908] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:z0927589670@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:01 ME-E0109: [2616] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:winnie_tonton@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:01 ME-E0109: [2840] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:dadkk@yahoo.com.tw] was denied for requesting IP Address 36.224.135.22
07/24/17 00:00:01 ME-E0109: [1132] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:satan_1_7@yahoo.com.tw] was denied for requesting IP Address 111.241.149.198
07/24/17 00:00:01 ME-E0109: [2468] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:wingodbruce@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:01 ME-E0109: [900] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:nana77383@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:01 ME-E0109: [1808] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:n98134@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:01 ME-E0109: [1564] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:awxxer@yahoo.com.tw] was denied for requesting IP Address 1.160.112.210
07/24/17 00:00:01 ME-E0109: [2908] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:zfrl@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:01 ME-E0109: [2616] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:yijing9422891@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:01 ME-E0109: [2840] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:chiaochiao0913@yahoo.com.tw] was denied for requesting IP Address 36.224.135.22
07/24/17 00:00:01 ME-I0074: [3036] (Debug) End of conversation
07/24/17 00:00:01 ME-E0109: [1132] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:sinotrust@yahoo.com.tw] was denied for requesting IP Address 111.241.149.198
07/24/17 00:00:01 ME-E0109: [2468] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:wmldms88@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58
07/24/17 00:00:01 ME-E0109: [900] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:number10@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:01 ME-E0109: [1808] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:rgnan@yahoo.com.tw] was denied for requesting IP Address 114.24.12.58
07/24/17 00:00:01 ME-E0109: [1564] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:sai981112@yahoo.com.tw] was denied for requesting IP Address 1.160.112.210
07/24/17 00:00:01 ME-E0109: [2908] Relay Denied: Failed to meet all relay criteria. Attempt to relay to [SMTP:yfab@yahoo.com.tw] was denied for requesting IP Address 1.160.116.58

MailEnable-Ian
Site Admin
Posts: 8439
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: spam attack is increasing my smtp log file

Postby MailEnable-Ian » Tue Aug 01, 2017 1:10 am

Hi,

At some point, you were either open relay or changed the password the spammer was using that had been compromised. Any case no way to stop the connections, they will slowly die off once the spammer realizes they can no longer relay. Upgrading to Professional or Enterprise provides Abuse policies that can help detect and automatically ban dictionary attacks.
Regards,

Ian Margarone
MailEnable Support

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