If the score is high enough (by default 5.0), the message is considered spam. Each rule adds or removes points in the message’s score. It will check email message against a large set of rules. If for some reason it’s adjustment isn’t enough, I assume you can go digging in the SpamAssassin rules and tweak it further, but I haven’t looked into it yet since this simple change did the trick for me. The Mail::SpamAssassin::SMTP::SmartHost module implements simple SMTP client connection for use with the Net::SMTP::Server module. SpamAssassin is a free, open-source, flexible and powerful spam-fighting tool. It does this by using the ALL_TRUSTED rule: X-Spam-Status: No, score=-0.668 tagged_above=-10 required=6.31 tests= Once this new section is present in your mail headers SpamAssassin can tell when a message has been authenticated by a local user and adjust their spam score accordingly. (Authenticated sender: adam) by (Postfix) with ESMTP id 046699C10F ![]() (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client did not present a certificate) This change adds a new “Authenticated sender:” section to the “Received:” header of the message, eg: Received: from ( ) In your “main.cf” add this line and restart Postfix: smtpd_sasl_authenticated_header = yes With modern versions of Postfix (at least 2.3.0) and SpamAssassin (at least 3.1.4) it turns out that fixing this is pretty simple. There’s a lot of (mis)information out there about this but in the end I found a great site which listed all of the common complaints people have about this sort of thing and what you can do to fix it. This seemed silly so I went digging to see what could be done about it. This of course means that SpamAssassin can’t treat the message any differently. Additional tools include: bash, curl, less, logrotate, nano, vim. Individual container performance monitoring is performed by zabbix-agent. It turns out that by default Postfix doesn’t include any details in the message headers to show that a it came from an authenticated source. Outgoing SMTP capabilities are handlded via msmtp. ![]() The problem was that the message had been marked as spam, and quite rightly they were asking why the mail server didn’t automatically trust them to not spam since they’d had to authenticate to send the message. 5.14 Allow SMTP relay of mail without encryption/authentication 5.15 SMTP Authentication TLS before Auth disable &. If the SMTP client has a PTR record, you can find a line in Postfix log like below. Every mail server admin should set PTR record for their SMTP servers. If (open (USER_PREFS, "/home/$user/.I run a small mail server for a group of friends, yesterday one of them forwarded me a message which they’d sent through my server using authenticated SMTP. Due to the prevalence of spam, many mail servers (such as Gmail, gmx.com, gmx.net, ) require that SMTP clients have valid PTR records associated with their IP addresses. #edit this User's user_prefs and find the value: My $user = Exim::expand_string('$acl_m1') #log_str("user found: $user from $user_listn") # This will create a colon separated list for each recipient, padding the new value to the same variable. # Set variable for user to be used by spamassassin ![]() # ACL that is used after the RCPT command With the smtp-time scanning, step 3 of the SA install guide is not needed: you can leave the spamcheck_director commented out.ĭaemon_smtp_ports = 25 : 587right after it, add: Most users find that if they receive mail via SMTP and have enabled Greylisting that they get little additional benefit from using SpamAssassin as well. This assumes that you've already enabled SpamAssassin on your system. ![]() This guide is considered to be in ALPHA testing. If you want smtp-time checking, use EasySpamFigher in combination with SpamBlocker 4.x: Spamassassin supports the detection of GTUBE (Generic Test for Unsolicited Bulk Email) test string.
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