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Why the antispam features do not work in my Exchange server?

Posted on 2015-02-06
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Last Modified: 2015-03-12
This is using MS Exchange server 2013. However, even that I already configured the antispam to work, I don't think it is working as none of the spam caught and sent to my quarantine mailbox. This is how I configure the antispam:

   a.      Open EMS, and browse to D:\Program Files\Microsoft\Exchange Server\v15\Scripts\;
double-click Install-antispamAgents.ps, to install antispam feature

b.      In EMS, type get-transportagent:

c.      In EMS, type get-transportconfig | fl internalSMTPServers; ensure the Exchange Server IP is included

d.      In EMS, type get-transportservice | fl Agentlog*; to see the settings as follows:

-      AgentLogMaxAge
-      AgentLogDirectorySize
-      AgentLogFileSize
-      AgentLogPath
-      AgentLogEnabled
e.      In EMS, type get-contentfilterconfig | fl SCL*; to see the SCLs for Delete, Reject, and Quarantine:

-      SCLDeleteThreshold (9); SCLDeleteEnabled (true)
-      SCLRejectThreshold (8); SCLRejectEnabled (false)
-      SCLQuarantineThreshold (6); SCLQuarantineEnabled (true)

f.      In EMS, type get-OrganizationConfig | SCL*; to see the settings for SCLJunkThreshold:

-      SCLJunkThreshold (5)

g.      In EMS, type get-SenderIDConfig | fl Spoofed*; to see the settings:

-      SpoofedDomainAction (StampStatus)

h.      In EMS, type get-SenderReputationConfig | fl: to see the selective settings:

-      SenderBlockingEnabled (true)
-      SrlBlockThreshold          (6)        * default, 7
-      SenderBlockingPeriod    (36)      * default, 24

i.      In EMS, type get-SetSenderFilterConfig | fl Block*; to add in and see the current blocked sender and blocked sender domain:

Set-SenderFilterConfig -BlankSenderBlockingEnabled $true –BlockedDomainsAnd Subdomains lucernepublishing.com -BlockedSenders @{Add="user1@contoso.com","user2@contoso.com"}

-      BlankSenderBlockingEnabled (true)

j.      In EMS, type get-IPBlockListProvider; to see list of RBL in descending priority:

Add-IPBlockListProvider:
-      name (bl.spamcop.net); lookupdomain (bl.sampcop.net)
-      name (bb.barracudacentral.org); lookupdomain (bb.barracudacentral.org)
-      name (ix.dnsbl.manitu.net); lookupdomain (ix.dnsbl.manitu.net)
-      name (combined.njabl.org); lookupdomain (combined.njabl.org)
-      name (zen.spamhaus.org); lookupdomain (zen.spamhaus.org)
-      name (psbl.surriel.net); lookupdomain (psbl.surriel.net)

k.      In EMS, type get-IPAllowListProvider; to see list of RBL in descending priority:

Add-IPAllowListProvider:
-      name (swl.spamhaus.org); lookupdomain (swl.spamhaus.org)
-      name (iadb.isipp.com); lookupdomain (iadb.isipp.com)
-      name (query.bondedsender.org); lookupdomain (query.bondedsender.org)


Anything I missed out?
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Question by:MichaelBalack
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8 Comments
 
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Expert Comment

by:Alexander Kireev
ID: 40596584
Hello,

Did you restart "MsExchange Transport Service" service to take effect?

To verify you could check statistics of your Anti-Spam filters by Get-AntiSpamFilteringReport.ps1 script.
https://technet.microsoft.com/en-us/library/bb124795%28v=exchg.150%29.aspx
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Author Comment

by:MichaelBalack
ID: 40600260
Hi Alexander,

Yes, transport service was restarted.

Give me some times to look into the link.
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Author Comment

by:MichaelBalack
ID: 40627663
Hi Alexander,

Sorry for the delay due to the long lunar chinese new year. I'll look into it tonite.
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Author Comment

by:MichaelBalack
ID: 40637797
Hi Alexander,

Please see the errors...
get-antispamreport.bmp
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Expert Comment

by:Alexander Kireev
ID: 40637833
Hello,

I think that you didn't set a command parameter.

You can run this script to draw a report for the Exchange Anti Spam Agents. The following values are accepted as command parameters:

    messagesrejected
    messagesdeleted
    connections
    messagesquarantined

Usage:

    .\Get-AntispamFilteringReport.ps1 <command> –report <path>
http://www.proexchange.be/blogs/exchange2010/archive/2011/12/18/the-exchange-2010-scripts.aspx
http://social.technet.microsoft.com/wiki/contents/articles/19122.exchange-server-how-to-diagnose-spam-problem.aspx
0
 
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Author Comment

by:MichaelBalack
ID: 40637900
Hi Alexander,

I typed ".\get-antispamfilteringreport.ps1 messagesrejected c:\drivers\antispam_1.txt", and error occurred.

I typed ".\get-antispamsclhistogram.ps1" and the following table displayed:

name                                                                                     value
1                                                                                             1
8                                                                                             1
0                                                                                             3
7                                                                                             32
not availble: content filtering bypassed                          67

Any comment?
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Accepted Solution

by:
Alexander Kireev earned 500 total points
ID: 40638102
Is your ContentFilter Enabled? (Set-ContentFilterConfig -Enabled $true)
Is your SenderID Enabled? (Set-SenderIdConfig -Enabled $true)

Try to troubleshoot your Anti-spam by recomendations from an articles:
http://www.theemailadmin.com/2012/09/troubleshooting-exchanges-built-in-anti-spam-technologies-pt-6-sender-id/
https://technet.microsoft.com/en-us/library/jj937231%28v=exchg.150%29.aspx
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Author Closing Comment

by:MichaelBalack
ID: 40661367
Specially thanks to Alessandro for his patience and efforts. I started to receive spams being quarantined day by day. These are trully spams.
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