Re: Anti-spam filters

John Summerfield escribió:

In postfix we are very picky about who we listen to, your IP must resolve, your helo name must resolve, your IP address must not me mentioned in any blocklist we use (spamhaus is the best). Those rules alone block at least half the spam.

My postfix those all the resolve sender MTA, but I'm totally against dnsbl as, for example, my ISP often gets in some of them.

Also, nobody I handle mail for speaks Chinese, Korean, Russian, Spanish or Portugese or expects mail from places where any of those is the primary language. Therefore, when I'm checking my logs and see an attempt to break in using ssh, or send spam I have no hesitation in blocking the entire network as revealed by whois. Mostly, it's a /24 network, but there are one or two /13s.

I would prefer to get 1 or 2 spams (which I don't get with my actual configuration) then lose mail due to very stricy mail policies.

--
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list

Relevant Pages

  • Re: Anti-spam filters
    ... resolve, your helo name must resolve, your IP address must not me mentioned in any blocklist we use. ... My postfix those all the resolve sender MTA, but I'm totally against dnsbl as, for example, my ISP often gets in some of them. ... Therefore, when I'm checking my logs and see an attempt to break in using ssh, or send spam I have no hesitation in blocking the entire network as revealed by whois. ...
    (Fedora)
  • Re: The IIS Admin Service service terminated unexpectedly
    ... The workaround changes recommended by Symantec did resolve the crashing issue but the amount of SPAM getting through to our end-users is up as a result. ... I'm going to test which line out of the 5 might be causing the issue - after our server was rebooted this morning the log shows the services restarting quickly after it was closed so it did stay up after reboot but the issue remained until I fixed the xml file. ...
    (microsoft.public.exchange.admin)
  • RE: Backdoor-CGT
    ... contains an IFRAME, which should not open on any reasonably patched system ... or previewing spam on a machine that is severely patch-deficient with no ... no guarantee the IP address will remain constant. ... If it does not resolve at ...
    (Incidents)
  • OT: MyRealBox (was: HaHa, HoHo, & HeeHee)
    ... Fred Moore wrote: ... returnat the line breakfor the URL to properly resolve.] ... Are you getting a lot of spam? ... management methods. ...
    (comp.sys.mac.system)
  • Re: DNS Problems on Win2k SP4
    ... Adam Welch <NO SPAM WelchAN76@hotmail.com NO SPAM> posted a question ... Then Kevin replied below: ... because the domain will not resolve. ... you can use regedit to export the value to a registry file. ...
    (microsoft.public.win2000.dns)