SuperMailOS

SuperMailOS is business email for founders and teams managing multiple products, brands, or domains. It puts addresses from every connected domain into one inbox, so support, hello, billing, and personal mail can be managed together without maintaining separate mail plans for each domain.

The platform is built around a per-person pricing model rather than charging for every address. You can create unlimited aliases across connected domains, and each address can deliver to the same real mailbox. When replying, you can choose the appropriate domain and address without switching between separate email accounts.

Key Features

Unified Multi-Domain Inbox

Manage email from multiple domains in one mailbox.

SuperMailOS lets users bring together addresses such as:

• hello@
• support@
• billing@
• sales@
• Personal addresses

This is useful for founders and teams running several products or brands.

Unlimited Aliases

Create multiple addresses without paying separately for each mailbox.

Aliases can be created across connected domains, allowing one person to manage different customer-facing addresses from the same inbox.

Send From Any Address

Reply using the address that matches the conversation.

Users can send mail as:

• hello@yourdomain
• support@yourdomain
• billing@yourdomain
• Other addresses they control

This keeps outgoing communication aligned with the appropriate brand or department.

Managed Email Deliverability

Handle the technical requirements needed for reliable business email.

SuperMailOS includes:

• DKIM
• SPF
• DMARC
• Email warm-up
• Sending reputation monitoring

This gives teams a centralized way to manage authentication and sending reputation across multiple domains.

Live DNS Verification

Verify domain configuration before sending email.

The setup process involves adding the required DNS records and having the system check them against the mail server's own zone.

This can make managing authentication across several domains easier, especially when adding new product or brand domains.

IMAP and SMTP Support

Keep using standard email clients alongside the webmail interface.

SuperMailOS supports:

• IMAP
• SMTP
• Webmail

This allows users to continue working through clients such as Apple Mail, Outlook, or Thunderbird.

Full Mailbox Features

Use familiar tools for managing everyday email.

The mailbox includes:

• Conversation threads
• Instant search
• Labels
• Drafts
• Signatures
• Keyboard shortcuts
• Dark mode

Built for Multi-Domain Business Email

SuperMailOS combines multi-domain inbox management, unlimited aliases, email authentication, deliverability tools, and standard mail protocols into one system for teams managing several addresses.

Key benefits include:

• One inbox across connected domains
• Unlimited aliases
• Per-person rather than per-address pricing
• Send from different domain addresses
• DKIM, SPF, and DMARC management
• Email warm-up and reputation monitoring
• Live DNS verification
• IMAP and SMTP access
• Webmail support
• Search, labels, threads, and drafts
• Standard email client compatibility
• Centralized mail infrastructure for multiple domains

Built For

• Founders
• Startup Teams
• SaaS Companies
• Agencies
• Multi-Brand Businesses
• E-commerce Teams
• Support Teams
• Marketing Teams
• Sales Teams
• Product Teams

Common Use Cases

• Managing email for multiple SaaS products
• Running several domains from one inbox
• Creating support addresses for different products
• Managing hello@ and billing@ addresses together
• Replying from different brand domains
• Consolidating business email accounts
• Setting up email for a new product domain
• Managing email authentication across multiple domains
• Using Apple Mail or Outlook with multiple business domains
• Reducing the number of separate mail providers

Why It Matters

Managing multiple products or brands often means creating separate mailboxes, configuring authentication repeatedly, and switching between providers just to handle routine conversations.

SuperMailOS takes a centralized approach. Multiple domains can feed addresses into one person's inbox, while unlimited aliases make it possible to create different customer-facing addresses without adding another mailbox charge.

The same setup also brings domain authentication and deliverability tools into the workflow. Teams can add DNS records, verify them live, and manage DKIM, SPF, DMARC, warm-up, and reputation from the same service.

Manage Every Business Address From One Inbox

Connect your domains, create the addresses you need, configure and verify the required DNS records, then manage mail from every product or brand in one inbox while replying from the appropriate domain through webmail, IMAP, or SMTP.