diff --git a/app/models.py b/app/models.py
index 32025acc..b92553fb 100644
--- a/app/models.py
+++ b/app/models.py
@@ -2702,6 +2702,14 @@ class DeletedSubdomain(Base, ModelMixin):
     domain = sa.Column(sa.String(128), unique=True, nullable=False)
 
 
+class InvalidMailboxDomain(Base, ModelMixin):
+    """Domains that can't be used as mailbox"""
+
+    __tablename__ = "invalid_mailbox_domain"
+
+    domain = sa.Column(sa.String(256), unique=True, nullable=False)
+
+
 # region Phone
 class PhoneCountry(Base, ModelMixin):
     __tablename__ = "phone_country"
diff --git a/migrations/versions/2022_010310_3d05479d0d11_.py b/migrations/versions/2022_010310_3d05479d0d11_.py
new file mode 100644
index 00000000..bc350a63
--- /dev/null
+++ b/migrations/versions/2022_010310_3d05479d0d11_.py
@@ -0,0 +1,36 @@
+"""empty message
+
+Revision ID: 3d05479d0d11
+Revises: d8a3dfe674f2
+Create Date: 2022-01-03 10:25:00.673761
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '3d05479d0d11'
+down_revision = 'd8a3dfe674f2'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('invalid_mailbox_domain',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('created_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=False),
+    sa.Column('updated_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=True),
+    sa.Column('domain', sa.String(length=256), nullable=False),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('domain')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('invalid_mailbox_domain')
+    # ### end Alembic commands ###