How to enable DNSBL, enhdnsbl Barracuda configuration in Sendmail, Enable Domain Black List\u00a0and white list.<\/p>\n
Domain Name System Blacklists, also known as DNSBL’s or DNS Blacklists, are spam blocking lists that allow a website administrator to block messages from specific systems that have a history of sending spam. Restart the sendmail service External Links:<\/b> \u00a0<\/b><\/p>\n","protected":false},"excerpt":{"rendered":" How to enable DNSBL, enhdnsbl Barracuda configuration in Sendmail, Enable Domain Black List\u00a0and white list. Sendmail with DNSBL Domain Name System Blacklists, also known as DNSBL’s or DNS Blacklists, are… Read more »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/posts\/123"}],"collection":[{"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/comments?post=123"}],"version-history":[{"count":4,"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/posts\/123\/revisions"}],"predecessor-version":[{"id":743,"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/posts\/123\/revisions\/743"}],"wp:attachment":[{"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/media?parent=123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/categories?post=123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.melberi.com\/linuxadmin\/wp-json\/wp\/v2\/tags?post=123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nTo enable external DSN based blacklist feature on your sendmail server, you can add the below mentioned configuration in the sendmail.mc file located in \/etc\/mail . Below I have mentioned eight dnsbl configurations, You can choose the black list based on your environment, server load etc and add it .
\nEdit\u00a0 sendmail.mc
\n#vim \/etc\/mail\/sendmail.mc<\/b><\/p>\n\r\nFEATURE(`enhdnsbl', `bl.spamcop.net', `\"Spam blocked see: http:\/\/spamcop.net\/bl.shtml?\"$&{client_addr}', `t')
FEATURE(dnsbl,`combined.njabl.org',`Message from $&{client_addr} rejected - see http:\/\/njabl.org\/lookup?$&{client_addr}')
FEATURE(rhsbl,`dsn.rfc-ignorant.org',`\"550 Mail from domain \" $`'&{RHS} \" refused. MX of domain do not accept bounces. This violates RFC 821\/2505\/2821 - see http:\/\/www.rfc-ignorant.org\/\"')
FEATURE(`dnsbl', `zen.spamhaus.org', `\"Rejected due to Spamhaus listing see http:\/\/www.abuse.net\/sbl.phtml?IP=\" $&{clientaddr} \" for more information\"')\r\n <\/b><\/pre>\n
\n#service sendmail restart<\/b><\/p>\n
\nwww.dnsbl.info<\/a> <\/b>
\nwww.spamcop.net<\/a><\/b><\/p>\n