{"id":195,"date":"2004-10-21T00:11:41","date_gmt":"2004-10-20T23:11:41","guid":{"rendered":"http:\/\/wp.devco.net\/?p=195"},"modified":"2009-10-09T17:12:42","modified_gmt":"2009-10-09T16:12:42","slug":"pre_and_post_greylisting_stats","status":"publish","type":"post","link":"https:\/\/www.devco.net\/archives\/2004\/10\/21\/pre_and_post_greylisting_stats.php","title":{"rendered":"Pre and Post greylisting stats"},"content":{"rendered":"<p>Following on from my <a href=\"http:\/\/www.devco.net\/archives\/2004\/10\/20\/smtp_greylisting.php\">previous post<\/a> about greylisting read the full version of this entry to see some stats before and after deploying it on my secondary MX.<\/p>\n<p><!--more--><br \/>\n<b>Greylisting only on the primary MX:<\/b><br \/>\nAverage mails tagged as spam per day before (10 day average): <b>153<\/b><br \/>\nSpam tagged for the day with just primary doing greylisting: <b>93<\/b><br \/>\n<b>Greylisting on secondary MX only:<\/b><br \/>\nAverage mails tagged as spam per day before (10 day average): <b>153<\/b><br \/>\nSpam tagged for the day with just primary doing greylisting: <b>40<\/b><br \/>\nMail stats for secondary server:<br \/>\n2004-10-17:<\/p>\n<blockquote>\n<pre>TOTAL               Volume    Messages     Hosts<br \/>Received            4980KB        1135       333<br \/>Delivered           4973KB        1165        13<\/pre>\n<\/blockquote>\n<p>2004-10-18:<\/p>\n<blockquote>\n<pre>TOTAL               Volume    Messages     Hosts<br \/>Received              12MB        1583       463<br \/>Delivered             12MB        1646         9<\/pre>\n<\/blockquote>\n<p>2004-10-19:<\/p>\n<blockquote>\n<pre>TOTAL               Volume    Messages     Hosts<br \/>Received              44MB        1602       446<br \/>Delivered             45MB        1641        14<\/pre>\n<\/blockquote>\n<p>2004-10-20:<\/p>\n<blockquote>\n<pre>TOTAL               Volume    Messages     Hosts<br \/>Received            4509KB          78        18<br \/>Delivered           4679KB          76         5<\/pre>\n<\/blockquote>\n<p>That is a HUGE reduction in spam mails entering the systems.  I am very happy with this.  Looking through the list of machines that I received mail from in the days before greylisting they are mostly dynamic hosts and other weird places.  Looking through the list of the last day they are all legit machines and only one of them can immediately be related to bulk mail sending.<br \/>\nIf I look at the remote hosts my machine communicated with, I can see that the advantage passed onto the people I am secondary for is huge, for my own primary MX the amount of mail dropped from 208 on the 19th to 7 on the 20th.<br \/>\nA hidden benefit from all this is that maintaining my secondary server has become much easier, previously it would always have large amount of bounces that was failing to deliver and eventually got frozen as well as large amounts of mail sitting there being rejected by MTA&#8217;s doing SMTP time spam checking.  Now, that&#8217;s all gone!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Following on from my previous post about greylisting read the full version of this entry to see some stats before and after deploying it on my secondary MX.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","footnotes":""},"categories":[5],"tags":[30,29],"_links":{"self":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/195"}],"collection":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/comments?post=195"}],"version-history":[{"count":1,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/195\/revisions"}],"predecessor-version":[{"id":742,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/195\/revisions\/742"}],"wp:attachment":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/media?parent=195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/categories?post=195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/tags?post=195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}