diff --git a/app/models.py b/app/models.py
index c0b700c7..d6b0dad7 100644
--- a/app/models.py
+++ b/app/models.py
@@ -2602,3 +2602,10 @@ class MessageIDMatching(Base, ModelMixin):
     # SimpleLogin Message ID
     sl_message_id = sa.Column(sa.String(512), unique=True, nullable=False)
     original_message_id = sa.Column(sa.String(1024), unique=True, nullable=False)
+
+    # to track what email_log that has created this matching
+    email_log_id = sa.Column(
+        sa.ForeignKey("email_log.id", ondelete="cascade"), nullable=True
+    )
+
+    email_log = orm.relationship("EmailLog")
diff --git a/migrations/versions/2021_110118_37feaba7c45d_.py b/migrations/versions/2021_110118_37feaba7c45d_.py
new file mode 100644
index 00000000..9f3d119a
--- /dev/null
+++ b/migrations/versions/2021_110118_37feaba7c45d_.py
@@ -0,0 +1,31 @@
+"""empty message
+
+Revision ID: 37feaba7c45d
+Revises: 6204e57b4bc4
+Create Date: 2021-11-01 18:40:32.932057
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '37feaba7c45d'
+down_revision = '6204e57b4bc4'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('message_id_matching', sa.Column('email_log_id', sa.Integer(), nullable=True))
+    op.create_foreign_key(None, 'message_id_matching', 'email_log', ['email_log_id'], ['id'], ondelete='cascade')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(None, 'message_id_matching', type_='foreignkey')
+    op.drop_column('message_id_matching', 'email_log_id')
+    # ### end Alembic commands ###