diff --git a/mail_tracking_mailgun/__manifest__.py b/mail_tracking_mailgun/__manifest__.py
index aebd127..47c158c 100644
--- a/mail_tracking_mailgun/__manifest__.py
+++ b/mail_tracking_mailgun/__manifest__.py
@@ -6,7 +6,7 @@
 {
     "name": "Mail tracking for Mailgun",
     "summary": "Mail tracking and Mailgun webhooks integration",
-    "version": "14.0.2.0.0",
+    "version": "15.0.1.0.0",
     "category": "Social Network",
     "website": "https://github.com/OCA/social",
     "author": "Tecnativa, Odoo Community Association (OCA)",
diff --git a/mail_tracking_mailgun/migrations/14.0.2.0.0/post-migration.py b/mail_tracking_mailgun/migrations/14.0.2.0.0/post-migration.py
deleted file mode 100644
index f5ed56c..0000000
--- a/mail_tracking_mailgun/migrations/14.0.2.0.0/post-migration.py
+++ /dev/null
@@ -1,34 +0,0 @@
-# Copyright 2021 Tecnativa - Jairo Llopis
-# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
-
-import logging
-
-from openupgradelib import openupgrade
-
-_logger = logging.getLogger(__name__)
-
-
-@openupgrade.migrate()
-def migrate(env, version):
-    """Update webhooks.
-
-    This version dropped support for legacy webhooks and added support for
-    webhook auto registering. Do that process now.
-    """
-    if version != "14.0.1.0.0":
-        return
-    settings = env["res.config.settings"].create({})
-    if not settings.mail_tracking_mailgun_enabled:
-        _logger.warning("Not updating webhooks because mailgun is not configured")
-        return
-    _logger.info("Updating mailgun webhooks")
-    try:
-        settings.mail_tracking_mailgun_unregister_webhooks()
-        settings.mail_tracking_mailgun_register_webhooks()
-    except Exception:
-        # Don't fail the update if you can't register webhooks; it can be a
-        # failing network condition or air-gapped upgrade, and that's OK, you
-        # can just update them later
-        _logger.warning(
-            "Failed to update mailgun webhooks; do that manually", exc_info=True
-        )
diff --git a/mail_tracking_mailgun/models/res_partner.py b/mail_tracking_mailgun/models/res_partner.py
index 0e6bc45..6e201f8 100644
--- a/mail_tracking_mailgun/models/res_partner.py
+++ b/mail_tracking_mailgun/models/res_partner.py
@@ -32,11 +32,9 @@ class ResPartner(models.Model):
                 event.id or 0,
                 event.id or _("unknown"),
             )
-            body = _("Email has been bounced: %s\nReason: %s\nEvent: %s") % (
-                partner.email,
-                reason,
-                event_str,
-            )
+            body = _(
+                "Email has been bounced: %(email)s\nReason: %(reason)s\nEvent: %(event_str)s"
+            ) % ({"email": partner.email, "reason": reason, "event_str": event_str})
             partner.message_post(body=body)
 
     def check_email_validity(self):
diff --git a/mail_tracking_mailgun/tests/test_mailgun.py b/mail_tracking_mailgun/tests/test_mailgun.py
index fefb74d..e4f265c 100644
--- a/mail_tracking_mailgun/tests/test_mailgun.py
+++ b/mail_tracking_mailgun/tests/test_mailgun.py
@@ -398,6 +398,9 @@ class TestMailgun(TransactionCase):
         }
         with self.assertRaises(UserError):
             self.partner.check_email_validity()
+        # If we autocheck, the mail will be bounced
+        self.partner.with_context(mailgun_auto_check=True).check_email_validity()
+        self.assertTrue(self.partner.email_bounced)
         # Unable to fully validate
         mock_request.get.return_value.json.return_value = {
             "is_valid": True,
@@ -405,7 +408,6 @@ class TestMailgun(TransactionCase):
         }
         with self.assertRaises(UserError):
             self.partner.check_email_validity()
-        self.assertTrue(self.partner.email_bounced)
 
     @mock.patch(_packagepath + ".models.res_partner.requests")
     def test_email_validity_exceptions(self, mock_request):