mailing-lists: be really clear that mail from non-subscribed addresses is dropped

- faq: improve clarity that you must be subscribed to mail any list.
- index, all-lists: Add a note that you must be subscribed to mail, with
  link to faq/instructions.
- all-lists: duplicate the code-of-conduct reminder from the index page

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

3 files changed, 25 insertions, 6 deletions

diff --git a/get-involved/mailing-lists/all-lists.html b/get-involved/mailing-lists/all-lists.html
index dc7ae4d..e42c1c4 100644
--- a/get-involved/mailing-lists/all-lists.html
+++ b/get-involved/mailing-lists/all-lists.html
@@ -14,6 +14,14 @@ title: 'All mailing lists'
 </p>
 
 <p>
+  Like all of our Gentoo community venues, the mailing lists are governed by our <a href="https://wiki.gentoo.org/wiki/Project:Council/Code_of_conduct">Code of Conduct</a>.
+</p>
+
+<p>
+  Please ensure you read the <a href="/get-involved/mailing-lists/instructions.html" aria-selected="false">list instructions &amp; FAQs</a> for help mailing the lists. You <b>must</b> be subscribed (regular, digest or nomail) to send mail to the lists. Mail from unsubscribed addresses will be dropped.
+</p>
+
+<p>
   This page lists all mailing lists offered by our project and tells you who the moderators are.
 </p>
 
diff --git a/get-involved/mailing-lists/index.html b/get-involved/mailing-lists/index.html
index 40ca84b..86ec914 100644
--- a/get-involved/mailing-lists/index.html
+++ b/get-involved/mailing-lists/index.html
@@ -24,6 +24,10 @@ title: 'Mailing lists'
   Like all of our Gentoo community venues, the mailing lists are governed by our <a href="https://wiki.gentoo.org/wiki/Project:Council/Code_of_conduct">Code of Conduct</a>.
 </p>
 
+<p>
+  Please ensure you read the <a href="/get-involved/mailing-lists/instructions.html" aria-selected="false">list instructions &amp; FAQs</a> for help mailing the lists. You <b>must</b> be subscribed (regular, digest or nomail) to send mail to the lists. Mail from unsubscribed addresses will be dropped.
+</p>
+
 <h2>Main lists</h2>
 
 <h3>gentoo-user</h3>
diff --git a/get-involved/mailing-lists/instructions.md b/get-involved/mailing-lists/instructions.md
index 75b4d3e..5d0fd81 100644
--- a/get-involved/mailing-lists/instructions.md
+++ b/get-involved/mailing-lists/instructions.md
@@ -33,6 +33,8 @@ Once subscribed to the list, you can post to it by sending an email to:
 
 `listname@lists.gentoo.org`
 
+If you are not subscribed, your mail will be silently dropped. See the <a href="nomail-i-subscribed-to-a-list-using-my-home-email-address-but-i-cant-post-to-the-list-from-work-what-do-i-do-to-fix-this">"Nomail"</a> section below for a further discussion.
+
 ## Unsubscribing
 
 To unsubscribe from a list, send an empty email to:
@@ -80,17 +82,22 @@ The moderators can be reached by emailing:
 
 ## FAQ
 
-### I subscribed to a list using my home email address, but I can't post to the list from work. What do I do to fix this?
+### Nomail: I subscribed to a list using my home email address, but I can't post to the list from work. What do I do to fix this?
 
 To reduce spam, all of our lists are configured to only allow posts from official subscriber email addresses.
-Fortunately, mlmmj supports "nomail" subscriptions, allowing you to register alternate email addresses that can be used only for posting to the list.
+
+Mail from addresses that are not subscribed is silently dropped.
+
+It is possible to subscribe for posting-only: mlmmj supports "nomail" subscriptions, allowing you to register alternate email addresses that can be used only for posting to the list.
 
 Here's an example of how this works:
-Let's say you subscribed to the gentoo-dev list as `jim@home.com`, but you'd also like to post to the list using your `james@work.com` email address.
-To do this, send a message (as `james@work.com`) to `gentoo-dev+subscribe-nomail@lists.gentoo.org`.
-You should then be allowed to post to gentoo-dev using both your home and work email addresses.
 
-In line with the original spam reduction goal, if you post to the list from a non-subscribed address, your mail will be delivered to <tt>/dev/null</tt>.
+1. Let's say you subscribed to the gentoo-dev list as `jim@home.com`, but you'd also like to post to the list using your `james@work.com` email address.
+2. To do this, send a message (as `james@work.com`) to `gentoo-dev+subscribe-nomail@lists.gentoo.org`.
+3. You should then be allowed to post to gentoo-dev using both your home and work email addresses.
+
+In line with the original spam reduction goal, if you post to the list from a non-subscribed address, your mail will be delivered to `/dev/null`.
+
 You will not receive any bounce message from our servers. This prevents spammers from forging your address to get a bounce delivered to you.
 
 ### I want to switch from regular delivery to digest delivery. How do I do this?