Base
Hardened build
minimal ports, security patches applied at build time
Dovecot on Ubuntu 24.04 LTS
Azure
Streaming & Messaging
Dovecot, the secure open source IMAP and POP3 mail server, ready to serve mailboxes over TLS minutes after it boots.
Overview
Dovecot is one of the most widely deployed open source IMAP and POP3 servers in the world, chosen for its security focus, standards compliance and excellent performance. This image runs Dovecot as a self contained, secure by default single node mail store: one virtual mailbox with its mail kept in Maildir format under a dedicated unprivileged account, local delivery over LMTP, and IMAP and POP3 served over TLS. Any standards compliant mail client can connect securely, and you can add further mailboxes or front the server with an MTA such as Postfix.
It suits platform and messaging engineers, DevOps teams and small businesses that want a secure, standards compliant mailbox server they fully control, with their mail kept on their own server.
Why the cloudimg image
cloudimg delivers Dovecot fully installed and hardened, so a secure mailbox server is running within minutes of launch. On the first boot of every instance a one shot service generates a unique mailbox password, hashes it into the Dovecot password database, regenerates the TLS private key and certificate and writes the plaintext login to a file only the root user can read, so no shared or default credential ships in the image. Plaintext authentication is refused on the non TLS ports until the connection is upgraded with STARTTLS, and only the virtual mailbox user can authenticate. Every deployment is paired with a step by step deploy guide and backed by 24/7 support.
Common uses
- A secure, self hosted IMAP and POP3 mailbox server you fully control
- Standards compliant mailbox access over TLS for any IMAP or POP3 client
- The mailbox store behind an MTA such as Postfix for a complete mail stack
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