From 97470f42cfa4fc75ff0f0f45a4f940da8c92d5c4 Mon Sep 17 00:00:00 2001 From: Ian Gulliver Date: Sun, 21 Apr 2019 17:36:52 +0000 Subject: [PATCH] Mail relaying with NetSuite --- 2006-03-03-mail-relaying-with-netsuite.html | 26 +++++++++++++++++++ index.html | 1 + .../2006-03-03-mail-relaying-with-netsuite.md | 24 +++++++++++++++++ markdown/index.md | 1 + 4 files changed, 52 insertions(+) create mode 100644 2006-03-03-mail-relaying-with-netsuite.html create mode 100644 markdown/2006-03-03-mail-relaying-with-netsuite.md diff --git a/2006-03-03-mail-relaying-with-netsuite.html b/2006-03-03-mail-relaying-with-netsuite.html new file mode 100644 index 0000000..15746f1 --- /dev/null +++ b/2006-03-03-mail-relaying-with-netsuite.html @@ -0,0 +1,26 @@ + + + + + +

When sending a reply to a valid “message.@messages.netsuite.com” address, I discovered something interesting. NetSuite uses these addresses to store a copy of the message with the order, then forwards the message along to the real destination. However, the forwarding method is busted.

+ +

It translates the headers in the original message. I sent:

+ +
From: Ian Gulliver <ian@penguinhosting.net>
+To: “George Sasson (PAA)” <messages.<msgid>@messages.netsuite.com>
+Cc: ian-djmart@penguinhosting.net
+
+ +

It internally translated this to:

+ +
From: ian@penguinhosting.net
+To: george@proaudioamerica.com
+Cc: ian-djmart@penguinhosting.net
+
+ +

It then passed the message to its outgoing mail program, which reparsed the headers. In this case, it means that I got two copies of the message; one from my local MTA because of the CC, and one back from NetSuite because of the CC.

+ +

prox helped me test this; it works when the CC isn’t coming back to the same host. That means it’s a valid relay method.

+ + diff --git a/index.html b/index.html index 4006dc6..0b9705c 100644 --- a/index.html +++ b/index.html @@ -40,6 +40,7 @@
  • 2009-Sep-11: Confusing BIND with CNAMEs
  • 2009-Feb-19: The odd case of my mugging
  • 2009-Feb-03: 5-packet TCP connection?
    • +
  • 2006-Mar-03: Mail relaying with NetSuite
  • 2006-Mar-02: udev is your friend
  • 2006-Mar-02: Why is my directory empty and large?
  • 2006-Feb-26: Why isn’t mod_auth_pam working with NIS?
    • diff --git a/markdown/2006-03-03-mail-relaying-with-netsuite.md b/markdown/2006-03-03-mail-relaying-with-netsuite.md new file mode 100644 index 0000000..dc0a877 --- /dev/null +++ b/markdown/2006-03-03-mail-relaying-with-netsuite.md @@ -0,0 +1,24 @@ + + + + + +When sending a reply to a valid “message.@messages.netsuite.com” address, I discovered something interesting. [NetSuite](http://netsuite.com/) uses these addresses to store a copy of the message with the order, then forwards the message along to the real destination. However, the forwarding method is busted. + +It translates the headers in the original message. I sent: + + From: Ian Gulliver + To: “George Sasson (PAA)” @messages.netsuite.com> + Cc: ian-djmart@penguinhosting.net + +It internally translated this to: + + From: ian@penguinhosting.net + To: george@proaudioamerica.com + Cc: ian-djmart@penguinhosting.net + +It then passed the message to its outgoing mail program, which __reparsed the headers__. In this case, it means that I got two copies of the message; one from my local MTA because of the CC, and one back from NetSuite because of the CC. + +[prox](http://prolixium.com/) helped me test this; it works when the CC isn’t coming back to the same host. That means it’s a valid relay method. + + diff --git a/markdown/index.md b/markdown/index.md index eca355e..97d91b9 100644 --- a/markdown/index.md +++ b/markdown/index.md @@ -39,6 +39,7 @@ 1. 2009-Sep-11: [Confusing BIND with CNAMEs](2009-09-11-confusing-bind-with-cnames.html) 1. 2009-Feb-19: [The odd case of my mugging](2019-02-19-the-odd-case-of-my-mugging.html) 1. 2009-Feb-03: [5-packet TCP connection?](2009-02-03-5-packet-tcp-connection.html) +1. 2006-Mar-03: [Mail relaying with NetSuite](2006-03-03-mail-relaying-with-netsuite.html) 1. 2006-Mar-02: [udev is your friend](2006-03-02-udev-is-your-friend.html) 1. 2006-Mar-02: [Why is my directory empty and large?](2006-03-02-why-is-my-directory-empty-and-large.html) 1. 2006-Feb-26: [Why isn’t mod\_auth\_pam working with NIS?](2006-02-26-why-isnt-mod_auth_pam-working-with-nis.html)