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Create Your Temporary Email Address
Choose a username and domain above. Your inbox is live the moment you do — no signup, no ads, no waiting.
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Emails passing through our service
Real-time flow of temporary emails. Queued = delivered · Denied = blocked by filters.
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Temp Mail with Your Own Custom Domain
Use your company's domain for disposable inboxes. Receive email at test@yourdomain.com, staging@yourcompany.com, or any custom address — without setting up a mail server.
At a glance
Workflow
Connect Domain -> Verify -> Create Alias -> Receive Mail.
Connect Your Domain and Get Started
What Is Custom Domain Temp Mail?
Custom domain temp mail allows you to point your own web domain (e.g., @tech-startup.com) to our infrastructure. This enables you to generate disposable email addresses that look fully professional and branded, while still retaining the ephemeral, disposable nature of temp mail.
Definition: BYOD Email
Bring-Your-Own-Domain (BYOD) email is a feature where the user provides the DNS authority (domain name), and the service provider handles the SMTP reception, processing, and display of messages.
Why Connect Your Domain?
Standard temp mail domains are sometimes blocked by strict websites. By using your own custom domain, you bypass these blocklists entirely. It also adds a layer of professionalism for client-facing tests and internal QA processes.
Control and Reputation
You control the reputation of your domain. Unlike shared domains which can be abused by others, your custom domain is exclusive to you.
Business Benefits
- Bypass 'Disposable Email' blocklists
- Professional branding for demos
- Centralized management of test emails
- No need to run your own mail server
- Create unlimited aliases instantly
- API access for automation
Advanced Domain Features
- DNS Verification Wizard
- DKIM/SPF Support
- Inbox Routing Rules
- Multi-domain support
- Team collaboration tools
- Auto-forwarding (optional)
Free vs. Custom
While our standard service is free, custom domain connectivity is a premium feature designed for power users and businesses.
Enterprise Speed
Emails sent to your custom domain are routed through priority SMTP queues, ensuring near-instant delivery for time-sensitive OTPs.
Private Infrastructure
Emails received on your custom domain are private to your account. No one else can generate addresses on your domain.
Enterprise Security
We enforce TLS encryption on incoming connections to your custom domain, protecting sensitive test data in transit.
- TXT Record ownership verification
- TLS enforcement
- Isolated storage buckets
- Role-based access control
- API Key security
- Audit logging
Professional Use Cases
- QA Automation Suites
- Client Demonstrations
- Staging Environment Testing
- Employee Training Portals
- Marketing Campaign Testing
- Deliverability Monitoring
Integration Guide
- 1Log in to Pro Dashboard.
- 2Navigate to 'Domains'.
- 3Add your domain URL.
- 4Copy DNS records.
- 5Update DNS provider.
- 6Verify connection.
- 7Generate emails.
- 8Automate via API.
How to Connect Your Domain
- 1Add your domain in Dashboard → Custom Domains
- 2Add the required MX and TXT DNS records shown in the setup guide
- 3Click Verify — propagation typically takes under 10 minutes
What Comes with Custom Domain Temp Mail
- Unlimited inboxes on your domain
- 25MB attachment support
- Permanent 5GB cloud storage
- Full API access for automation
- Sender muting and inbox management
- Priority Support
Unlimited Prefixes
With your own domain, you can create any prefix you want. user1, test-admin, support-ticket-123 — the possibilities are infinite.
Your Brand, Our Tech
Keep your brand front and center while we handle the dirty work of processing incoming emails.
Shared vs. Custom Domain
| Feature | Custom Domain (Pro) | Shared Domain (Free) |
|---|---|---|
| Reputation | ✓ High (Exclusive to you) | Variable (Shared) |
| Block Rate | ✓ Low | Medium |
| Branding | ✓ Your Brand | Generic |
| Privacy | ✓ Private Access | Public Access |
| Permanence | ✓ Permanent Option | 24 Hours |
Common Issues
- Test emails getting blocked
- Someone else stealing your alias
- Domain expiring mid-test
- Unprofessional look
The Pro Solution
- Whitelisted domains
- Exclusive ownership
- Permanent routing
- Professional image
Market Comparison
✓ Full Suite
✗ Expensive/Complex
✓ Developer focus
✗ No UI inbox
✓ Instant UI + API
✗ Email receive only
Best for Testing
For receiving test emails without the hassle of a full mail server, FreeCustom Pro is unmatched.
Example
You set up 'mail.startup.io'. You send email to 'test@mail.startup.io'. It appears in your dashboard instantly.
Authorization: Bearer YOUR_API_KEY
Discord & Custom Domains
Verify your Discord bot using a custom domain to look official and professional.
Business Privacy
Keep your business testing data separate from Meta's tracking pixels.
Telegram Official
Secure your official Telegram channel with a branded custom domain email.
Critical OTPs
Custom domains ensure you never miss a critical business verification code due to a blocklist.
Verified Flow
Authenticated routing ensures only you see the verification codes.
Reddit & Brands
Manage your brand's Reddit presence securely.
Discord Uses
- Official Bots
- Community Management
- Developer Accounts
- Partner verification
Insta Brand
- Official Business Pages
- Ad Accounts
- Support channels
- Influencer campaigns
Telegram Uses
- Official Channels
- Support Bots
- Admin Verification
OTP Scenarios
- AWS/Azure Login
- Bank Verification
- SaaS Tools
- SSO Providers
Types
- Secure Links
- MFA Codes
- Approval Buttons
- Confirmations
Reddit Uses
- Official AMAs
- Brand Support
- Ad Management
- Community Engagement
Custom Domain Temp Mail FAQ
Quick answers to common queries about this topic.
Guides
