Formerly Cotse.Net
Your email address connects your identity everywhere you use it.
Break that chain of vulnerability.
- Unlimited Addresses in over 30 domains and/or use your own.
- Give every place a different custom address that identifies them.
- Give out addresses on the fly without having to create them first.
- Reply from that address like any other mail.
- Easily identify who shared or exposed your email.
- Disable any address instantly without affecting any other mail.
- Never worry about a leaked email address again!
- We pioneered unlimited aliases nearly thirty years ago and perfected them into the most flexible setup available.
Simple to start, easy to use, powerful when you need it, and more features than any other service!
What makes CodaMail different
Unlimited Aliases
Give every website a different address. If one gets leaked or spammed, disable it instantly and senders get “user unknown.” We pioneered this over 25 years ago. Create unlimited aliases across 30+ domains, or use your own.
Over 25 Years of Trust
Launched January 1999, before Gmail existed and before privacy was a marketing term. We’ve operated continuously ever since with no investors, no ads, and no pivot. Just a service that gets better every year.
Rapid Response
Our support really sets us apart. Receive rapid personalized support any day of the week, including weekends and holidays. We’re here when you need us.
Your Keys, Your Mail
AES-256-GCM encryption at rest by default. For maximum privacy, generate your own PGP keys: we encrypt incoming mail, but we literally cannot read it. What “zero knowledge” actually means for email →
Multiple Alias Types
Domain Aliases: Your username works across all 30+ included domains. Toggle any on or off; each has its own catch-all subdomain.
Masked Aliases: Create addresses with any name you choose across 30+ domains, fully functional email addresses, each with its own catch-all subdomain.
Auto-Expiring Aliases: Addresses that self-destruct on a specific date (format: YYYYMMDD@domain). Perfect for temporary signups.
Private Domains: Use your own domains with full alias support. Unlimited addresses, subdomain support, and the ability to route aliases to other CodaMail accounts for families or teams.
Flexible Encryption
Encrypted by Default: Every email stored with AES-256-GCM, headers included. No setup required.
Zero-Access Option: Generate your own PGP keys on your own hardware. Upload only your public key. We encrypt incoming mail but literally cannot decrypt it. Only you can, with Thunderbird, Apple Mail, or Mailvelope.
Auto-Encrypt by Rule: Encrypt all mail, only specific aliases, or messages matching filter criteria.
True End-to-End: When senders encrypt before sending, we’re just a blob store. Your mail, your keys, your choice.
Integrated Calendar, Tasks & Notes
Calendar: Multiple calendars with events, invitations, reminders, and recurring entries. Auto-generate birthday calendars, import holidays for 80+ countries, convert emails to events. Full ICS import/export. Syncs live to all devices.
Tasks: Task lists with due dates and priorities. Convert emails to tasks, ICS import/export, live device sync.
Notes: Private notes in Markdown, HTML, or plain text alongside your email. Attach images and PDFs. Send any note as an email attachment in one click. Encrypted at rest.
Private Calendar, Task & Contact Sync: Connect your devices’ native calendar and contacts apps via CalDAV and CardDAV. Works with iOS, Android, macOS, Windows, and Thunderbird. Changes sync instantly both ways. Each shared device or person gets a separate login that reveals nothing about your account. Share a calendar without exposing your username. Set per-person permissions, expiration dates, and revoke access instantly. All data encrypted at rest and in transit. CalDAV URLs are anonymized.
Powerful SMTP-level Blocking
Address Control: Disabled addresses get “user unknown”, senders see that address as no longer existing.
Sender & Server Blocking: Block specific senders, entire domains, domain endings (.xyz, country codes), or sending servers. Wildcards supported.
All blocking happens at the SMTP handshake, messages are rejected before our server accepts them, so spammers remove you from their lists automatically. We are the only service that hooks you directly into the SMTP handshake for hard rejections.
Block by Language: Filter email by language at the server level. Accept mail only in languages you understand, or block entire languages if you only receive spam in certain character sets. Perfect for international users or anyone tired of foreign-language spam slipping through.
Ad-Free & Tracking Protection
No Ads, Ever: No ads, no data sales, no attention monetization. Your inbox is yours alone.
Tracker Blocking: Block remotely hosted images that let senders know when you opened their email.
Read Receipt Blocking: Strip read receipt headers automatically. Senders can’t demand to know when you read their mail.
No External Resources: The entire interface loads locally. No calls to Google, no CDNs, no analytics, no telemetry. Nothing phones home.
Custom Header Control: 35+ headers stripped (X-Originating-IP, User-Agent, X-Mailer, and dozens more) from every outgoing message, stopping recipients from identifying your location, software, or device. Keep specific headers if you need them, add your own, or remove additional ones beyond our defaults. All changes apply at the server level and work with any email client. Your custom e-mail client leaks information in its headers, every email app does this. Our service stops these leaks no matter what app you use for your email!
VPN, SSH & Web Hosting
Browse privately with VPN and proxy services that hide your real location. Full web hosting (worth $120+/year) included in popular plans — host WordPress sites, blogs, or personal websites with easy-to-use control panel.
Custom Domains: Use your own domains with full alias support and our entire feature set. Unlimited addresses, subdomain support, and the ability to route aliases to other CodaMail accounts for families or teams.
Experience 25+ years of excellence
No credit card. No email required.
Features people don’t expect from email
A quick tour of additional capabilities. The complete list goes deeper.
Responsive Design
Our webmail perfectly adapts to your device with separate interfaces for phone, tablet, and desktop. Easily use your email from anything with a web browser. Webmail is compatible with Mailvelope.
Complete Customizability
Personalize our webmail with layout changes and 40+ color schemes. Make it look like your favorite mail app with your favorite colors. You can also use your favorite email app.
Secure Link Attachments
Send encrypted files to anyone — even Gmail users who don’t have encryption. Your file is encrypted on your computer before upload, then shared as a link. Only people you give the password to can download it. Get notified when someone downloads your file, and it auto-deletes after 24 hours. Perfect for securely transferring private documents.
Email Hub
Pull email from your other accounts into one place and even encrypt it automatically upon retrieval. Send from those accounts too — replies appear to come from the original address, routed through the proper mail server so your messages are authenticated and don’t land in spam. Use CodaMail as a secure hub for all your email without exposing your IP address.
Advanced Mail Filters
Automatically organize incoming mail with powerful filters. Sort by sender, recipient, subject, or message size. Move to folders, forward, delete, flag, set up auto-replies or vacation responses. Plus our unique auto-encrypt action — automatically encrypt specific messages as part of any message filter.
Scheduled & Delayed Send
Schedule for later: Compose now, send at any future date and time — uses your configured timezone. Perfect for birthday greetings, business hours delivery, or reminder emails. View, edit, reschedule, or delete pending messages anytime. Undo Send: Configure a 5-30 second delay after clicking send — giving you a window to catch mistakes, add forgotten attachments, or cancel entirely.
Restricted POP & IMAP
Control how email apps connect to your account with App Passwords. Create separate passwords for each device, restrict by IP address or location, limit what each can do (receive only, send only, etc.), set expiration dates, and revoke access instantly. Protects against hackers trying stolen passwords.
Auto-Reply, Forwarding & Templates
Vacation Auto-Reply: Set start/end dates, reply frequency per sender, and what happens to mail while you’re away. Filter-Based Auto-Reply: Auto-reply to messages matching specific criteria without a blanket vacation message. Forwarding: Forward all mail or a copy to another address. Quick Responses: Save template replies and insert with one click while composing.
Cryptographic Sender Verification
Every sender gets a unique visual avatar based on a cryptographic hash. If someone tries to impersonate a contact you know, their avatar will be completely different — making phishing attempts obvious at a glance. Spot email forgeries before you even read them.
Deadman Switch
Automatically send pre-written messages with or without attachments if you don’t log in for a set number of days. Useful for notifying loved ones or business partners if something happens to you. Can also automatically lock or delete your account for added peace of mind. Messages and attachments are fully encrypted prior to storage.
Quick Setup & Rapid Support
30-day free trial, no card required. Accounts manually processed to protect against scammers (typical setup within hours). All staff rotate on helpdesk — get personalized expert help from the people who actually build the system, any day of the week.
Personal Notes alongside Email
Private notes in Markdown, HTML, or plain text alongside your email. Attach images and PDFs. Send any note as an email attachment in one click. Encrypted at rest, available wherever your webmail is.
We’ve been doing this longer than almost anyone still operating
They come for the features and stay for the support.
- No Free Tier: Every resource goes to paying subscribers. We tried freemium — it meant free users consumed the support and infrastructure that paying customers deserved. If you’re paying for a service, that service should be dedicated to you.
- Standards-Based: Open protocols mean you’re never locked in. Everything imports and exports in standard formats. Your data is always yours to take.
- Transparent Operation: Built on open-source software, operated without marketing hype or investor pressure.
- Personal Touch, Serious Infrastructure: Built on robust, redundant systems refined over 25+ years. When you contact support, you reach the people who actually built and run it, not a script reader.
Why have I not heard about you before?
We’ve never advertised (except mentioning in some forums). People find us after trying other services and wanting more. That’s been true since 1999.
“We spend our time perfecting the service, not the sales pitch.”
From the CodaMail blog
Three references we maintain continuously — plus long-form analysis from the team.
Privacy Law Directory
38+ jurisdictions across US federal/state, EU, and the wider world. Data-protection regimes, surveillance powers, encryption restrictions, and the actual enforcement record. Updated monthly.
Browse the directory →
Data Broker Directory
1,700+ named entities across 17 categories — adtech, consumer, financial, health, location, employment, insurance, and more. Sourced profiles plus opt-out information.
Browse the directory →
VPN Infrastructure Exposed
Who really runs your VPN. Corporate ownership chains, jurisdiction shopping, logging contradictions, and the gap between “no logs” marketing and operational reality.
Read the investigation →
We use:
- Open standards (IMAP, POP, SMTP, CalDAV, CardDAV)
- AES-256-GCM encryption at rest
- Your own PGP keys end-to-end (optional)
- Reject at the SMTP-level
- Self-hosted infrastructure across four states, three countries
- No ads, no tracking, no telemetry, no CDNs
- 35+ headers stripped from outgoing mail
- 27 years of continuous operation