Fix List-Unsubscribe email header value: add angle brackets

CHANGELOG.md

@@ -9,7 +9,8 @@ All notable changes to this project will be documented in this file.
 - Added JSON endpoint for Shields.io (#304)
 
 ### Bug Fixes
-- Don't set CSRF cookie on first visit. Signup is exempt from CSRF protection.
+- Don't set CSRF cookie on first visit. Signup is exempt from CSRF protection
+- Fix List-Unsubscribe email header value: add angle brackets
 
 
 ## v1.11.0 - 2019-11-22

hc/accounts/models.py

@@ -174,7 +174,7 @@ class Profile(models.Model):
 
         unsub_url = self.reports_unsub_url()
 
-        headers = {"List-Unsubscribe": unsub_url, "X-Bounce-Url": unsub_url}
+        headers = {"List-Unsubscribe": "<%s>" % unsub_url, "X-Bounce-Url": unsub_url}
 
         ctx = {
             "checks": checks,

hc/api/transports.py

@@ -61,7 +61,7 @@ class Email(Transport):
 
         unsub_link = self.channel.get_unsub_link()
 
-        headers = {"X-Bounce-Url": bounce_url, "List-Unsubscribe": unsub_link}
+        headers = {"X-Bounce-Url": bounce_url, "List-Unsubscribe": "<%s>" % unsub_link}
 
         try:
             # Look up the sorting preference for this email address