Add a table for mail aliases

migrations/20230829163818_aliases.sql

@@ -0,0 +1,8 @@
+-- Add migration script here
+ALTER TABLE emails ADD COLUMN alias BOOLEAN NOT NULL DEFAULT false;
+
+CREATE TABLE alias_recipient (
+	mail TEXT REFERENCES emails(mail) NOT NULL,
+	recipient TEXT NOT NULL,
+	PRIMARY KEY (mail, recipient)
+);