From fa1d71a58f5afdf0f06f5944c044560d5b7c13ba Mon Sep 17 00:00:00 2001 From: Pete Date: Thu, 12 Oct 2017 13:29:33 +0200 Subject: [PATCH] Add new file --- docs/hardening/postfix-ldap/README.md | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 docs/hardening/postfix-ldap/README.md diff --git a/docs/hardening/postfix-ldap/README.md b/docs/hardening/postfix-ldap/README.md new file mode 100644 index 0000000000..b256d4b7dd --- /dev/null +++ b/docs/hardening/postfix-ldap/README.md @@ -0,0 +1,17 @@ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + +If mails get transparently forwarded to another mailserver, a mechanism to block +mail for invalid recipients makes sense, and drastically increaes the well-known +backscatter problem. + +LDAP queries are used to check for valid recipients, and forwards the mail, if +an entry for the user is found. + +For this to work, on Debian/GNU Linux, you also have to install postfix-ldap by + +apt install postfix-ldap + + +Further information can be found @ https://blog.nwsec.de/wordpress/?p=1031 + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ \ No newline at end of file -- GitLab