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EMAIL

Honkio Mail

Email hosting for businesses on their own domain

Multi-tenant email hosting: IMAP and POP3 mailboxes, its own SMTP receiver, sending through Postmark, spam filtering and a self-service portal where customers add their own domains, mailboxes and DNS records. In production at mail.honkio.net.

  • MailboxesIMAP and POP3 (Dovecot), quotas, aliases and per-device app passwords.
  • Zero-touch setupOutlook, Apple Mail, iOS, Android and Thunderbird configure themselves (autodiscover, autoconfig, mobileconfig).
  • Receiving and sendingIts own SMTP receiver (port 25) and Postmark Inbound. Outgoing mail goes through Postmark, submitted over SMTP on 587 and 465.
  • Spam filteringDNSBL and SPF checks, spam filed to the Junk folder. An AI classifier is on the way.
  • Self-service portalDomain wizard, automatic DNS records, users, diagnostics and webmail.
  • Newsletters and web pagesBulk sending, plus web pages and a web shop on the customer's own domain.

Who it is for

Companies that want email on their own domain without running a mail server. The customer sets it up in the portal: adds the domain, proves ownership through DNS and creates the mailboxes.

How mail flows

Incoming mail arrives at the SMTP receiver or the Postmark Inbound webhook. It is checked (DNSBL, SPF), aliases are expanded and the message is delivered to Dovecot. Outgoing mail goes through Postmark on the customer's own Postmark server, so one customer's sending does not affect the reputation of others.

  • Separate streams for transactional mail and mass mailings
  • Sent mail is filed in the sender's Sent folder
  • Message content is never stored in the database or logs, only metadata

Self-service portal

The portal manages mailboxes, aliases, quotas, app passwords and users, and webmail runs in the browser. When the domain is at joker.com, the portal writes and checks its DNS records automatically. Billing uses Honkio orders.

Install on your own server

The mail stack (mail-api, Dovecot, SMTP receiver, submission and archiver) can be downloaded as a Docker Compose package for one Linux server. Mailboxes are then managed with a command-line tool. The portal needs the Honkio platform.