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Spamming Issue - Emails

Krishna Iyer
Hello,
 
One of our customers is facing a problem with Incoming Spam Emails in their email IDs, having up to 90 Users hosted in a VPS Server.
 
1) A high Amount of Password Hacking Emails are coming to their email IDs, the following is an example
2) Once we received it, we set Global Email Filters to Deliver to Spam Folder next time, but every time we received different types of emails in user's inbox instead of the spam folder.
3) The current SPAM Score is - Spam Threshold (required_score) (4).
4) We also block the domains from where spamming, but every time we get spamming from new domains
5) Need a solution for the same
6) Only experts please reply
 
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Comments

5 comments

Date Votes
  • cPRex Jurassic Moderator

    Hey there!  Unfortunately there is no perfect spam filtering solution.  Your best option in this case would be to use the details here to train SpamAssassin to identify more spam:

    https://support.cpanel.net/hc/en-us/articles/360053149353-How-to-teach-SpamAssassin-to-identify-more-spam

    I would start with that and see if you notice an improvement in the spam filtering on the system.

    0
  • Krishna Iyer

    Hi cPrex,

    Thank you for the reply, we are now marking phishing emails as spam, I saw that this was not happening before, I think, and now we are training the SpamAssassin.

    Is there a list of keywords or phishing content available with Cpanel? which we can set in Global Filters to avoid spam delivering in the Inbox.

    I have a question in my mind, how do other email service providers manage spam filters?

    Just wanted to know about it. 

     

     

    0
  • cPRex Jurassic Moderator

    I don't have any particular list of keywords that I can provide.

    I will say, there are more advanced tools than SpamAssassin, but they come at an additional cost.  There are also other free options like Mailscanner: https://configserver.com/free-cpanel-mailscanner-installer/

    0
  • Krishna Iyer

    Hi,

    The following steps are done to prevent, 

    Implemented a more stringent SPF policy and introduced a DMARC record with a quarantine policy.

    Additionally, it was noted that the CSF firewall on the server was previously disabled.

    Need to guidance on one part, as of now we can see that 

    Allow DKIM verification for incoming messages [?] is "OFF"
    By default, Exim verifies syntactically valid signatures in incoming mail, even when Exim is not configured to act on the results of the check. This verification process can degrade your server's performance.
     
    Can we ON this one? Will this reduce phishing emails? Need your help.
     
    Regards
     

     

    0
  • cPRex Jurassic Moderator

    Turning that on would definitely help as any message that fails the DKIM check would not be delivered.

    0

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