1.    11 Aug 2017 #1
    Join Date : Oct 2015
    Posts : 23
    window 10

    One or more computer sending email SPAM


    Apparently there are 1 or more PCs in the network sending out spam. I do not use a local email server. I have outlook from Office365 subscription

    How do I find the culprit? I have a Draytek Vigor 2830.

    I have tried:

    - Wireshark looking at [ tcp.port == 25 ]
    - Bitdefender Security suite scan on networked PC's
      My ComputerSystem Spec
  2.    11 Aug 2017 #2
    Join Date : Oct 2016
    Caledon, Ontario, Canada
    Posts : 4,074
    Windows 10 Pro Build 1703

    Hi renkun.


    Can I ask how you know this?

    I ask as MS sends you a weird message when you first get an account and the words lead to that conclusion but all they really want is to verify you.


    Ken
      My ComputerSystem Spec
  3.    11 Aug 2017 #3
    Join Date : Oct 2015
    Posts : 23
    window 10
    Thread Starter

    My website host, reported to me that, PC(s) under my public IP was sending spam to hundred of people a day.
    Last edited by renkun; 11 Aug 2017 at 19:48.
      My ComputerSystem Spec
  4.    12 Aug 2017 #4
    Join Date : May 2015
    Central IL
    Posts : 4,247
    Mac OS Sierra

    Have you checked your sent items to see if it is coming out of your mailbox? You really need to do a through malware scan by using the info in this link. Read Run Me First Malware Removal Guide (incl. Spyware, Virus, Trojan, Hijacker) | MajorGeeks.Com Support Forums After reading the instructions, seehttp://forums.majorgeeks.com/showthread.php?t=139681 This will give you even more information. The CBL

    Nothing should be using Port 25, since pretty much every ISP is using SSL/TLS and ports 587 for SMTP, 993 for receiving if the Windows 10 app may be set up with spam botting. Now you can also go into your gateway logs and see if it shows any issues. Net Tools is a really good program to put into your arsenal. Essential NetTools; the Swiss Army knife of network diagnostics - MajorGeeks

    Wireshark is a really good program for sniffing out issues. That you can also get from Major Geeks website.
      My ComputerSystem Spec

 


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