Add the relay concept to the model

admin/mailu/admin/models.py

@@ -116,6 +116,20 @@ class Alternative(Base):
         return self.name
 
 
+class Relay(Base):
+    """ Relayed mail domain.
+    The domain is either relayed publicly or through a specified SMTP host.
+    """
+
+    __tablename__ = "relay"
+
+    name = db.Column(db.String(80), primary_key=True, nullable=False)
+    smtp = db.Column(db.String(80), nullable=True)
+
+    def __str__(self):
+        return self.name
+
+
 class Email(object):
     """ Abstraction for an email address (localpart and domain).
     """

admin/migrations/versions/c162ac88012a_.py

@@ -0,0 +1,29 @@
+""" Add relayed domains
+
+Revision ID: c162ac88012a
+Revises: c9a0b4e653cf
+Create Date: 2017-09-10 20:21:10.011969
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'c162ac88012a'
+down_revision = 'c9a0b4e653cf'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.create_table('relay',
+    sa.Column('created_at', sa.Date(), nullable=False),
+    sa.Column('updated_at', sa.Date(), nullable=True),
+    sa.Column('comment', sa.String(length=255), nullable=True),
+    sa.Column('name', sa.String(length=80), nullable=False),
+    sa.Column('smtp', sa.String(length=80), nullable=True),
+    sa.PrimaryKeyConstraint('name')
+    )
+
+
+def downgrade():
+    op.drop_table('relay')