\n\tHello,\n<\/p>\n
\n\tSendmail is a very often used MTA (Mail Transfer Agent) on unix platforms. It implements configurations to do realtime blocklist checks with lists from spamhaus.org or spamcop.net or any other blocklist. Open your \/etc\/mail\/sendmail.mc <\/em>and add following two lines to it:\n<\/p>\n \n\tFEATURE(`enhdnsbl', `sbl.spamhaus.org', `"554 Rejected " $&{client_addr} " – see http:\/\/www.spamhaus.org\/sbl\/"')dnl<\/em> \n\tPlease remember to put them after this line: \n\tIf you do not, the sendmail.cf compilation will fail with an error. Well now it's time to compile our config file, so type this:\n<\/p>\n \n\t# m4 \/etc\/mail\/sendmail.mc > \/etc\/mail\/sendmail.cf<\/em>\n<\/p>\n \n\tand restart the mail server with\n<\/p>\n \n\t# service sendmail restart<\/em>\n<\/p>\n \n\tThe advantage of this method is that the email is rejected before it enters the server so it saves bandwidth and cpu ressources. I personnally disabled the blocklist checking in MailScanner after using this because i found no need for it anymore.\n<\/p>\n \n\tThere are also a few config options i found useful:\n<\/p>\n \n\tthrottle connections to servers which sent out email to more than 10 invalid adresses: \n\treplace smtp welcome message with a custom string (hides sendmail verison): Hello, Sendmail is a very often used MTA (Mail Transfer Agent) on unix platforms. It implements configurations to do realtime blocklist checks with lists from spamhaus.org or spamcop.net or any other blocklist. Open your \/etc\/mail\/sendmail.mc and add following two lines to it: FEATURE(`enhdnsbl', `sbl.spamhaus.org', `"554 Rejected " $&{client_addr} " – see http:\/\/www.spamhaus.org\/sbl\/"')dnl FEATURE(`enhdnsbl', `bl.spamcop.net', `"554 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,7],"tags":[],"class_list":["post-392","post","type-post","status-publish","format-standard","hentry","category-linuxunix","category-servers"],"_links":{"self":[{"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/392","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=392"}],"version-history":[{"count":0,"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/392\/revisions"}],"wp:attachment":[{"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=392"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=392"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ndk.sytes.net\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=392"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\tFEATURE(`enhdnsbl', `bl.spamcop.net', `"554 Rejected " $&{client_addr} " – see http:\/\/www.spamcop.net\/bl.shtml"')dnl<\/em>\n<\/p>\n
\n\tinclude(`\/usr\/lib\/opcenter\/sendmail\/install\/popauth.m4')<\/em>\n<\/p>\n
\n\tdefine(`confBAD_RCPT_THROTTLE', `10')dnl<\/em><\/span>\n<\/p>\n
\n\tdefine(`confSMTP_LOGIN_MSG', `<Your custom string here> MTA, local time is $b')dnl<\/span><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"