diff --git a/patchwork/forms.py b/patchwork/forms.py
index e7d1ad27..43d21c09 100644
--- a/patchwork/forms.py
+++ b/patchwork/forms.py
@@ -102,8 +102,9 @@ class EmailForm(forms.Form):
 class UserProfileForm(forms.ModelForm):
     class Meta:
         model = UserProfile
-        fields = ['items_per_page', 'show_ids']
-        labels = {'show_ids': 'Show Patch IDs:'}
+        fields = ['items_per_page', 'show_ids', 'mid_scheme']
+        labels = {'show_ids': 'Show Patch IDs:',
+                  'mid_scheme': 'Message URL scheme'}
 
 
 def _get_delegate_qs(project, instance=None):
diff --git a/patchwork/migrations/0047_userprofile_mid_scheme.py b/patchwork/migrations/0047_userprofile_mid_scheme.py
new file mode 100644
index 00000000..47168a5f
--- /dev/null
+++ b/patchwork/migrations/0047_userprofile_mid_scheme.py
@@ -0,0 +1,22 @@
+# Generated by Django 4.2.7 on 2024-01-11 04:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('patchwork', '0046_patch_comment_events'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='userprofile',
+            name='mid_scheme',
+            field=models.CharField(
+                blank=True,
+                help_text='URL scheme to use when opening message IDs',
+                max_length=255,
+            ),
+        ),
+    ]
diff --git a/patchwork/models.py b/patchwork/models.py
index 67408b00..a4ab4490 100644
--- a/patchwork/models.py
+++ b/patchwork/models.py
@@ -173,6 +173,7 @@ class UserProfile(models.Model):
         default=False,
         help_text='Show click-to-copy patch IDs in the list view',
     )
+    mid_scheme = models.CharField(max_length=255, blank=True, help_text="URL scheme to use when opening message IDs")
 
     @property
     def name(self):
diff --git a/patchwork/templates/patchwork/submission.html b/patchwork/templates/patchwork/submission.html
index 85e7be4b..b23d6c2c 100644
--- a/patchwork/templates/patchwork/submission.html
+++ b/patchwork/templates/patchwork/submission.html
@@ -29,6 +29,9 @@ <h1>{{ submission.name }}</h1>
       (<a href="{{ submission.list_archive_url }}">mailing list archive</a>)
 {% endif %}
       <span class="btn-link btn-copy glyphicon glyphicon-copy" data-clipboard-text="{{ submission.url_msgid }}" title="Copy to Clipboard"></span>
+      {% if user.is_authenticated and user.profile.mid_scheme %}
+      <a href="{{user.profile.mid_scheme}}:<{{submission.url_msgid}}>" title="Open Message"><span class="btn-link glyphicon glyphicon-new-window"></span></a>
+      {% endif %}
     </td>
   </tr>
 {% if submission.state %}