Email server, save emails to db and publish to virtual topic

Working on a PoC Very high-level requirements: .net sql server Need to self host an email server for my domain Need database to save emails 1. Domain table (<pk> domainId, domain, enabled) 2. User table (<pk> userId, <fk> domainId, email_address, enabled, ...) 2. Email table (<pk> emailId, <fk> userId, to, from, subject, body, mime_type) 3. Attachment table (<pk> attachmentId, <fk> emailId, attachment, mime_type) 4. Audit table (<pk> auditId, <fk> emailId, message, datatime, eventType) For all incoming emails save email to database tables For every email saved to the database add a message to a virtual topic (activeMq) For every email saved to database and published to virtual topic delete email from email system