For a long time, email on my domain meant forwarding. A message arrived at a domain address and quietly continued to my regular inbox. It worked well, but the address was still an alias rather than a mailbox of its own.
I wanted to try the next step: a separate account that Thunderbird could use like any ordinary mailbox, with its own folders, sent mail, and login.
The constraint
The existing forwarding setup had to keep working. This was an experiment, not a reason to rebuild every address on the domain or turn a small server into a full mail platform.
The result is deliberately hybrid. The forwarding service still handles the established addresses, while one new address is delivered to a lightweight mail stack on an existing Free Tier VM. Postfix receives the messages, Dovecot stores and serves them over IMAP, and outgoing mail goes through a managed SMTP relay.
That gave me a real mailbox without adding webmail, contact management, calendars, or a large administration suite.
The part that needed care
Running the software was the easy part. Email only becomes useful when the surrounding details agree: encrypted connections, authenticated sending, DNS records for sender verification, certificate renewal, abuse protection, and rules that prevent the server from becoming an open relay.
I tested both directions from outside the server. Messages arrived in Thunderbird, replies reached external inboxes, and the authentication checks passed. The original forwarding address continued to behave exactly as before.
I am intentionally leaving exact server addresses, DNS values, account details, and firewall rules out of this post. They would add little to the story and too much to an operational map.
Was Free Tier enough?
Yes. For one personal mailbox with modest traffic, the mail services barely register beside the other small jobs already running on the VM. Storage growth and deliverability still deserve attention, but raw computing power is not the limiting factor here.
The result is pleasantly boring: Thunderbird opens, mail synchronizes, and the address behaves like a mailbox instead of a forwarding trick.
That was the whole experiment—and it worked.