Use mailing lists instead of aliases for stalwart

migrations/20231008093906_alias_table.sql

@@ -0,0 +1,4 @@
+-- Add migration script here
+DROP TABLE alias_recipient;
+DELETE FROM emails WHERE alias = true;
+ALTER TABLE emails DROP COLUMN alias;

migrations/20231008094925_lists.sql

@@ -0,0 +1,7 @@
+CREATE TYPE mail_type AS ENUM ('primary', 'alias', 'list');
+
+ALTER TABLE emails 
+	ADD COLUMN type mail_type DEFAULT 'primary';
+
+ALTER TABLE emails
+	ALTER COLUMN type DROP DEFAULT;

migrations/20231008100114_lists_recipients.sql

@@ -0,0 +1,12 @@
+-- Add migration script here
+
+ALTER TABLE emails
+	ADD CONSTRAINT email_type_unique UNIQUE (mail, type);
+
+CREATE TABLE list_recipients (
+	list TEXT NOT NULL,
+	type mail_type NOT NULL CHECK (type = 'list'),
+	recipient TEXT NOT NULL,
+	PRIMARY KEY (list, recipient),
+	FOREIGN KEY (list, type) REFERENCES emails (mail, type)
+);

migrations/20231008101016_type_not_null.sql

@@ -0,0 +1,3 @@
+-- Add migration script here
+ALTER TABLE emails
+	ALTER COLUMN type SET NOT NULL;