My server is using Centos 6.5
\nI updated from Plesk 11.5 to 12 last week and postfix to 2.8.17.
\nSince then, all mails sent using the sendmail binary (notifications, mail forwards…) are being rejected with a wrong HELO hostname: localhost.
\nIt seems that sendmail is using locahost as a HELO tag which is not accepted.<\/p>\n
<\/p>\n
Qick Fix:<\/p>\n
remove whole non_smtpd_milters from postfix main.cf in case you do not use commtouch.
\nIf you would like to use commtouch then you can remove only “inet:127.0.0.1:12768” from non_smtpd_milters.
\nrestart postfix.<\/p>\n
<\/p>\n
Link:\u00a0http:\/\/forum.sp.parallels.com\/threads\/postfix-mails-sent-through-sendmail-binary-are-blocked-because-of-wrong-helo.305216\/<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
My server is using Centos 6.5 I updated from Plesk 11.5 to 12 last week and postfix to 2.8.17. Since then, all mails sent using the sendmail binary (notifications, mail forwards…) are being rejected with a wrong HELO hostname: localhost. It seems that sendmail is using locahost as a HELO tag which is not accepted. … 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":[86,87],"tags":[],"class_list":["post-1768","post","type-post","status-publish","format-standard","hentry","category-plesk","category-postfix"],"_links":{"self":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1768","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/comments?post=1768"}],"version-history":[{"count":0,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1768\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/media?parent=1768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/categories?post=1768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qbytes.cloud\/index.php\/wp-json\/wp\/v2\/tags?post=1768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}