Custom domain email & email API

Great things start
with an email.

Professional email on your own domain. A simple API for your applications. Instant temporary inboxes for testing. All in one place.

100 free API recipients / month · No credit card required
WEBMAIL PREVIEW
Compose Inbox 3 Starred Sent Drafts
Your inbox
JD
Jamie DavisA great idea starts here

Everything is ready for our next launch.

9:41
ST
Studio teamYour project, delivered

The latest designs are ready to review.

9:12
M
MailionsWelcome to your new inbox

Your domain. Your conversations.

8:30
Private mailbox · Browser, IMAP & SMTP
Your domain, authenticated.SPF, DKIM & DMARC verification
Verified
BUILT ON OPEN EMAIL STANDARDSIMAP + SMTPSPF / DKIM / DMARCHTTP API
ONE PLATFORM. MORE POSSIBILITIES.

Your email, working harder.

For everyday conversations, the applications you build, and the ideas you test.

01 / BUSINESS

A home for your
business email.

Create private mailboxes on your own domain. Read in the browser or connect your favorite email app.

Explore business email
02 / DEVELOPERS

One request.
Endless possibilities.

Send verification codes, account updates and transactional messages through a straightforward HTTP API.

Read the API guide
03 / TEMPORARY EMAIL

An instant inbox.
No account needed.

Choose a name or generate a temporary address. Receive test emails in a public inbox for 30 minutes.

Create a temporary inbox
Free · no login required

Need a temporary email address?

Receive test emails, sign-up links and verification codes in a public inbox. Free inboxes delete each message 30 minutes after it arrives.

Anyone who knows the address can read its mail. Receive only; avoid sensitive information.

THE DETAILS MAKE THE DIFFERENCE

Everything your email needs.

Explore the features available across private mailboxes, API sending and public temporary inboxes. Read the full feature and access guide.

Custom domains and DNS

Connect your domain, publish the supplied MX, SPF, DKIM and DMARC records, and check DNS from the panel. Each domain gets its own DKIM key.

Mailbox setup

Sending-only domains

Keep your existing inbox provider and MX records while using Mailions to send application emails under your domain.

Sending guide

Transactional email API

Send HTML, plain text, or both with To, Cc and Bcc recipients and your own sender name. Use domain-scoped API keys with examples for Node.js, PHP, Python and cURL.

API examples

Reliable retries and sending logs

Use an Idempotency-Key to retry the same API request without sending another copy. View sending activity and relay outcomes; relay acceptance does not confirm inbox delivery.

API reference

Private browser webmail

Sign in with your mailbox address and password, or open your own mailbox from the panel. Read, search, reply, forward, mark read or starred, and manage Spam and Trash.

Open webmail

Drafts, contacts and signatures

Save and reopen drafts, add your signature, get recipient suggestions learned from sent mail, select messages for bulk actions, and switch between your own mailboxes.

Webmail guide

Email apps and installable webmail

Use IMAP and SMTP in your preferred email app, or install webmail on supported browsers. Enable new-mail notifications where Web Push is configured and your browser supports it.

App and notification setup

Aliases and forwarding

Domain owners can create alternate receiving addresses and forward incoming mail to up to five destinations, with an option to keep a local copy. Aliases do not have their own login.

Aliases and forwarding

Filters and auto-replies

Set rules based on sender, recipient or subject, and schedule an out-of-office reply. Delivery rules require the service to have filtering and auto-replies configured.

Rules and auto-replies

Mailbox storage controls

Choose a mailbox storage size within the service limit and see storage usage in webmail. Storage enforcement and usage reporting depend on the server configuration.

Storage details

Paid attachment access

Attachments in webmail are disabled by default. Contact us for approval per mailbox; enabled mailboxes can attach up to 10 files and 1 MB in total per message. File checks remain in place.

Discuss attachment access

Public temporary email

Choose your own address name or generate a random address without logging in. Receive-only public inboxes refresh automatically and delete each message 30 minutes after it arrives. Anyone who knows the address can read its mail.

Create a temporary address

Permanent paid test inboxes

Contact us for paid retention. Sign in before creating an address to apply your approved access. Mail in your paid inboxes is kept permanently. Inboxes remain public and receive-only.

Discuss permanent retention

Email safety and access controls

Private mailbox and alias names cannot be opened as public inboxes. Email bodies block scripts and remote images by default. Webmail checks attachment types and contents; virus scanning and spam learning depend on service configuration.

Access and safety

Account and administration

Manage your account and domain-scoped keys. Administrators manage branding, sending and storage limits, delivery settings, temporary inbox availability, paid retention, and customer access.

Ask about your requirements
A CLEAR PATH TO YOUR FIRST EMAIL

Your domain. Four simple steps.

1

Add your domain

We generate a DKIM key and your DNS checklist instantly.

2

Publish the records

Copy a handful of DNS records into your provider — we walk you through it.

3

Verify

One click checks everything against live public DNS.

4

Start sending

Create an API key for your website (OTP codes, sign-up emails) or a mailbox for your email app.

ROOM TO START. SPACE TO GROW.

Start free. Grow on your terms.

Start free, or contact us for a custom quotation based on your requirements.

Free
$0/mo
For testing and small projects.
  • 100 API recipients / month
  • Use your own domains
  • DKIM / SPF / DMARC included
  • Sending API + mailboxes
  • Private webmail, drafts and signatures
  • Receive-only public inboxes: 30-minute expiry
Get started free
Custom Made for you
Let's talk
Contact the admin for a quotation tailored to your needs.
  • Discuss your monthly sending volume
  • Tell us your domain and mailbox requirements
  • Request pricing for your project
  • Paid webmail attachment access per mailbox
  • Permanent retention for approved public inboxes
Contact us
YOUR NEXT CHAPTER STARTS HERE

Give your email
a better home.

Create your account, add your domain and follow the DNS checklist to get started. No credit card needed.

Create free account
Already have an account? Log in
GOOD QUESTIONS. CLEAR ANSWERS.

Before you hit send.

What is Mailions?

Mailions provides custom domain mailboxes, private browser webmail, a transactional sending API and public temporary inboxes. Manage domains, authentication records and sending activity from the panel. Explore all features and access options.

Do I need my own domain?

For private mailboxes and API sending, connect a domain you own at any DNS provider. Public temporary inboxes use the service domain: choose a name or generate an address without bringing a domain or creating an account.

How do I send OTP codes or verification emails from my own domain?

Add your domain, publish the DNS records, then create an API key and send each email with one HTTPS request. The email API guide has copy-paste examples for Node.js, PHP, Python and cURL.

Can I use my domain email with Gmail, Outlook or my phone?

Yes. Every mailbox works over IMAP (port 993) and SMTP (port 587) in Outlook, Apple Mail, Thunderbird and the Gmail app, and Gmail on the web can send as your address. See the mailbox setup guide, including step-by-step Gmail setup.

Can I send email from WordPress, Laravel or PHP?

Yes. Any platform that supports SMTP works: WordPress with the WP Mail SMTP plugin, Laravel, PHPMailer, Nodemailer and Python. You can also use the HTTP sending API instead of SMTP.

What happens after my 100 free API recipients?

Sending pauses until the 1st of next month (the API answers with monthly_limit_reached, so your website can show a friendly message). Need more now? Contact us and we'll raise your limit. Each distinct To, CC or BCC recipient per request uses one unit. This allowance covers API sending; mailbox SMTP is separate. There are never surprise charges.

Will this hurt my domain's deliverability?

We help you configure DKIM, SPF and DMARC. Authentication supports deliverability, but inbox placement also depends on sender reputation, message content and recipient feedback; it is not guaranteed.

Can I use my own mail server instead?

This service is for people who'd rather not run and maintain their own mail server. If you already run one, that's essentially what we're doing for you, managed.

Can I read my private mailbox in the browser?

Yes. Open webmail with your mailbox address and password, or open your own mailbox from the panel. Search, reply, forward, save drafts, add a signature and use bulk message actions. Webmail currently composes plain-text messages.

How long does a temporary email address last?

On free inboxes each message is deleted 30 minutes after it arrives, and any address can be used again. Anyone who knows an address can read it without logging in. Contact us for permanent paid retention; sign in before creating an address to apply approved paid access. Temporary inboxes remain public and receive-only.

Are attachments included for free?

Webmail attachment sending is disabled by default. Contact us to discuss paid attachment access for a mailbox. Limits and file safety checks still apply after approval. Received attachments in private webmail can be downloaded subject to safety checks; public temporary inboxes have no attachment downloads.

Can I use aliases, forwarding, filters and auto-replies?

Domain owners can manage aliases and incoming-mail forwarding. Webmail settings offer filters and scheduled out-of-office replies when delivery rules are configured for the service. Read the mailbox guide for details.