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    What is your anti-spam strategy?
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    What is your anti-spam strategy?

    Besides from the usual SpamAssassin and ClamAV, what other anti-spam measures do you take both for incoming and outgoing mail?

    Comments

    • apt-get remove postfix

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    • Blocking specific IP ranges?

      idgaf

    • im using spamexperts. works good.

      Hola perro!

    • jarjar Provider

      Short of alternatives that exist to do the same as what you mentioned, like third party services, not sure what else there really is to have as a strategy. RBLs, I suppose.

      Thanked by 1deadbeef
    • UrDNUrDN Member
      edited September 2015

      Dspam is the most powerful free software which we setup for customers. Shady centralized blacklists like "dnsbl" should be avoided, especially the spamhaus ones.

      Thanked by 1deadbeef

      www.urdn.com.ua - KVM/Qemu hosting in Sweden.

    • http://efa-project.org is an excellent applinace

      Thanked by 1jar
      Hostigation High Resource Hosting - SolusVM KVM VPS / Proxmox OpenVZ VPS- Low Cost Comodo SSL Certificates
    • haraka or rspamdm and of course dnsbl, with a great trust to spamhaus.

    • MxToolBox ?

    • rm_rm_ Member
      edited September 2015

      Just for the record, I wanted to reply to this thread, and Cloudflare doesn't let me. @mpkossen

      Maybe the OP can figure out some bits of what I wanted to post, in that mess.

      Thanked by 2inthecloudblog J1021
    • doghouchdoghouch Member
      edited September 2015

      @Traffic said:
      apt-get remove postfix

      stupid reply (not being serious): this is a great idea to weed out all those pesky invoices for dedicated servers and hosting accounts

      Thanked by 1Traffic
    • doghouch said: stupid reply (not being serious): this is a great idea to weed out all those pesky invoices for dedicated servers and hosting accounts

      Technically you're right.

      I insist: technically.

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    • coolicecoolice Member
      edited September 2015

      Spamassassin has many plugins

      I used setup as this on my cpanel servers and it blocks over 90% of the spam
      http://technotes.trostfamily.org/?p=184 (it has non cpanel exim version too but the post is older)

      Connection Management:

      Step 1 – Network Denial of Service Protection (Upling takes care of that)

      Step 2 – Exim Rate Control +

      Step 3 – IP Reputation Analysis + (I added my Mail server ips to barracuda to use their RBL, also there was an issue in the past when querying spamhaus trough free name servers so as i use csf i just enable spamhaus as a lfd block list)

      Step 4 – Recipient Verification +

      Step 5 – Sender Verification + ( the light option Sender Verification no callouts)

      Content Scanning:

      Step 6 – Content (Virus and Spam) Scanning +

      Step 7 – Custom Policy +

      Step 8 – Fingerprint Analysis + (I'm not paranoid enough to run all 4 plugins but run 2 cPanel now has enabled pyzor by default but I like DCC so I addit :) remember to open ports in firewall if required

      Step 8 – Intent Analysis + (enabled by default in cPanel spam assassin ...)

      Step 9 – Image Analysis - (plugins are too old so i skip that)

      Step 10 – Bayesian Analysis - skipped (never seems them to work as expected)

      Step 11 – Rule-Based Scoring - default no auto delete over the score bur forced spam assassin

      that filters 95+ 98% of spam think it is close to better than spamexperts

      For outgouing ratelimits with allerts to investigate (im not too email friendly provider)

      OpenVz Node + KernelCare uptime - 1275 Days :)

    • rm_ said: Just for the record, I wanted to reply to this thread, and Cloudflare doesn't let me. @mpkossen

      Probably too much symbols in your reply. Filter is sometimes a bit strict about that.

      I recommend Prometeus, the best provider ever!

    • I don't use any anti-spam additions to my email server. I simply use disposable email addresses, and I invalidate them if they ever get into the hands of spammers. I don't do anything for outgoing email, either, because I'd have bigger problems if my server were compromised by spammers.

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    • Gmail lol

    • Greylisting. It's only useful for incoming mail.

      Large portions of spam are sent by malware-infected computers. Their SMTP engines are often incomplete, lacking retry capabilities, so failed spam won't get retried again. Greylisting uses this to separate real mail servers from spam-sending zombie PCs. Greylisting is resource friendly, and usually reduces the workload put on more heavy backend processing like SpamAssassin.


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