Knowledge base

Articles for Zappocity and Mailocity customers: people with mailboxes, the owners and admins who run a tenant, and customers of dnso.city and supporto.city. Short answers to common questions are in the FAQ.

Articles

• Words we use: organization, person, member, tenant and mailbox, and how they fit.
• DNS hosting (dnso.city): zones and records for customers' domains, its plans, and the zone API.
• Message trace: for team admins, how a message went through the mail server, why it went to Junk or was refused.
• Spam and Junk: how spam scores decide between the inbox, Junk and refusing, the Relaxed, Normal and Strict presets, allowed and blocked senders, and teaching the filter.
• Warnings about who sent a message: failed sender checks, look-alike domains and names showing another address.
• Risky attachments: programs, scripts, shortcuts, disk images and macro documents refused, and turning that off for a tenant.
• Virus scanning: choosing scanning for the tenant and each domain, and what happens to a message with a virus.
• Greylisting: holding mail from new senders once, the report of what was held, and trusting a sender's servers.
• Trusted forwarders: letting mail forwarded by another service (a university, an old provider) through when it fails the original sender's DMARC, by the forwarder's addresses or ARC seal.
• SPF, DKIM and DMARC: the SPF and DMARC settings behind your DNS records, and how incoming mail is checked and filed.
• Domain blocking: refusing mail by the sender's domain, its mail servers, or any domain a message links to.
• Rooms and equipment: bookable rooms and equipment, booked by inviting their address.
• Your own addresses: webmail, the team manager, forums and wiki at names on your own domain, and the wildcard certificate.
• Your own sign-in page: your logo, words, colours and layout on webmail's sign-in at your domain's own webmail address.
• Automatic DNS: publishing a domain's records on dnso.city (free) or in Route53 with your own key, and what it changes.
• Domain groups: grouping your domains and changing their settings together.
• Reactions: reacting to a message with an emoji, as in Outlook, and what others see.
• Several mailboxes for one person: one Zappocity sign-in for all your mailboxes, switching in webmail, and giving a person another mailbox.
• Shared mailboxes: an address such as sales@ several teammates read and send from, without a seat.
• Groups: Outlook-style groups people write to and @-mention.
• Mailing lists: distribution and discussion lists, moderators, joining by mail with plus addresses, and bounces.
• Tasks: to-do lists in webmail's calendar, JMAP and task apps (Apple Reminders, Thunderbird).
• Mentions: @-mention people in mail, events and notes.
• DMARC reports: collecting the daily reports providers send about your domain, and reading who sends as you.
• SMTP TLS reports: the daily reports senders send when they could not deliver to your domain over TLS.
• Importing addresses: many mailboxes, aliases and lists from a CSV file, checked before anything is made.
• Sending mail from your own scripts: the send API, with tokens you make in webmail.
• Sending through us from your own mail server: Exim, Postfix, Exchange and devices relaying as your domains (smarthost).
• Checking mail routing: MX, SPF, DKIM, ARC, DMARC, reverse DNS, MTA-STS and TLS-RPT checked as other servers see them, with what to fix.
• Set up DNS for your domain: the records Zappocity needs and how to add them at common DNS providers.
• Mail filters (Sieve): filing, flagging, forwarding and refusing mail as it arrives; tenant and domain rules; the API.
• Filter recipes: tested scripts to copy for lists, receipts, plus folders, spam scores, DMARC, vacations, forwarding and dates.
• Vacation replies (out of office): automatic replies while you are away, who gets one, and the Sieve vacation action.
• Plus addressing and automatic folders: the default folders, user+tag@ addresses and filing tagged mail in its own folder.
• Subdomain addressing: shop@amy.example.com reaching amy+shop@, or amy@shop.example.com reaching amy@, and the wildcard MX it needs.
• Dots in addresses: amy.smith@ and amysmith@, and ignoring dots per domain.
• Calendars: your calendars, team calendars, sharing a
• Video meetings: start or schedule meetings with webcams and screen sharing, and guests. calendar with anyone, subscription links and free/busy.
• Calendar and contacts apps: syncing with Apple Calendar and Contacts, Thunderbird and DAVx⁵ over CalDAV and CardDAV, and the team directory.
• S/MIME: signatures checked on arrival, your certificate in webmail, signing what you send, encrypted mail marked. badges mean and what is checked.
• Sharing your mailbox: letting a teammate read, change or send from your mailbox, and opening one shared with you.
• Developers: every API is published at /developers on the sites, generated from the specs in api/.
• Setting up mail apps: the IMAP, SMTP, JMAP and ManageSieve settings, shown with your username in webmail Settings.
• JMAP for mail apps and developers: signing in, keeping in sync with changes and queryChanges, and every Email/query filter.
• Webmail: signing in, reading, sending, attachments, remote images and how webmail uses JMAP.
• Passwords: changing, recovery address and resets: changing your password, the recovery address and reset links.
• Password rules, expiry and required changes: a team's password length and character rules, passwords that expire, and asking one person or everyone for a new password.
• Two-step sign-in and app passwords: codes from an authenticator app, recovery codes, app passwords for mail apps, and the admin reset.
• Passkeys: signing in to webmail with your fingerprint, face or device PIN instead of your password.
• Importing mail from another server: copying folders, flags and dates over IMAP, and running it again on moving day.
• The support desk: tickets from webmail to a team's admins or platform support, priority support, abuse tickets and internal notes on tickets and users.
• Secure information in support replies: a password or key from our staff, viewed once when signed in.
• Rating our support: rating a resolved request, and requests closed when we do not hear back.
• Service status: incidents and planned maintenance, on the account page and the sign-in page.
• Team wikis: pages with history, at /wiki, for members or anyone.
• Forums: the platform's forums and teams' own, at /forum, with moderation.
• OpenPGP: publish your public key in the Web Key Directory; encrypted and signed mail marked in webmail.
• DNS guides for common providers: adding the records at Route53, Cloudflare, GoDaddy, Namecheap, Squarespace, Porkbun, OVHcloud, Hetzner and DigitalOcean.
• Deleting mailboxes and accounts: by users, team admins and staff, after a grace period or at once; legal holds and last owners.
• Profiles and badges: handles, bios and badges (given by hand, early adopter, staff, administrator), shown on proven mail.
• supporto.city: the help desk sold to teams, a desk each, with its plans, seats and agents.
• Tether: IRC in your browser that stays connected, signed in with your Zappocity account; its plans and buying Pro for an organization.
• Keyboard shortcuts: every page's keys, and how to turn single-key shortcuts off.
• Notes: personal and team notes in webmail, in Markdown, and kept open beside your mail with checklists, saved as you type.
• One sign-in for everything: signing in to webmail, the team manager and the admin panel with a Zappocity account, signing out everywhere, and app passwords for mail apps.
• Belonging to several organizations: starting an organization, inviting people by email, roles, and leaving.
• Compliance archiving and legal holds: a team's copy of all mail sent and received, retention, holds, search and the access log.
• Sign-in security: lockouts after wrong passwords, sign-in history, sessions, security alerts, verification and approving signups.
• Team administration: the domain admin panel where a team's owners and admins manage users, aliases and proved domains.
• New mail without reloading, and new versions: live webmail updates, desktop notifications and the new-version bar.
• Conversations: how webmail groups replies, what the conversation buttons do, and turning grouping off.
• Contacts: your address books, address completion, and the people you write to collected for you.
• Writing mail: formats and signatures: rich text, Markdown, HTML and plain text, and a name and signature per address.
• Dedicated sending addresses: addresses only your mail leaves from, and their reverse DNS.
• Billing and tax: invoices, payment, the billing address and tax number, and disputes.
• Sending from your aliases and +tag addresses: which From addresses you may use, and adding your own aliases.
• Read tracking: being told when a message you sent is opened, how it counts, and its limits.
• Sender logos (BIMI): when a company's logo is shown next to its mail, and how it is fetched safely.
• Time zones: the time zone webmail, the account page and the server's messages use, and how to choose yours.
• Searching mail: what search looks through, phrases and leaving words out, and indexing of older mail.