diff --git a/docs/submittingpatches.html b/docs/submittingpatches.html
index 7910ae98f7a..5310b1d8c17 100644
--- a/docs/submittingpatches.html
+++ b/docs/submittingpatches.html
@@ -179,6 +179,16 @@ When submitting follow-up patches you should also login to
 state of your old patches to Superseded.
 </p>
 
+<p>
+Some companies' mail server automatically append a legal disclaimer,
+usually containing something along the lines of "The information in this
+email is confidential" and "distribution is strictly prohibited".<br/>
+These legal notices prevent us from being able to accept your patch,
+rendering the whole process pointless. Please make sure these are
+disabled before sending your patches. (Note that you may need to contact
+your email administrator for this.)
+</p>
+
 <h2 id="reviewing">Reviewing Patches</h2>
 
 <p>