diff --git a/app/models.py b/app/models.py
index 3ed03e2f..53018ab1 100644
--- a/app/models.py
+++ b/app/models.py
@@ -693,5 +693,8 @@ class CustomDomain(db.Model, ModelMixin):
         db.Boolean, nullable=False, default=False, server_default="0"
     )
 
+    # an alias is created automatically the first time it receives an email
+    catch_all = db.Column(db.Boolean, nullable=False, default=False, server_default="0")
+
     def nb_alias(self):
         return GenEmail.filter_by(custom_domain_id=self.id).count()
diff --git a/migrations/versions/2019_123018_10ad2dbaeccf_.py b/migrations/versions/2019_123018_10ad2dbaeccf_.py
new file mode 100644
index 00000000..40cf3984
--- /dev/null
+++ b/migrations/versions/2019_123018_10ad2dbaeccf_.py
@@ -0,0 +1,29 @@
+"""empty message
+
+Revision ID: 10ad2dbaeccf
+Revises: 696e17c13b8b
+Create Date: 2019-12-30 18:16:40.110999
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '10ad2dbaeccf'
+down_revision = '696e17c13b8b'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('custom_domain', sa.Column('catch_all', sa.Boolean(), server_default='0', nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('custom_domain', 'catch_all')
+    # ### end Alembic commands ###