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Temp mail by FreeCustom.Email — create a free temporary email address instantly. Use a disposable email to receive OTP and verification codesEvery app, trial, and forum wants your email address — and hands it straight to marketers. FreeCustom.Email gives you a real, working temp mail inbox on a custom domain in seconds, so your personal address stays private. No registration. Works instantly.
Temp Mail — Free Disposable Email Address, No Signup, No Ads.
Every app, trial, and forum wants your email address — and hands it straight to marketers. <strong>FreeCustom.Email gives you a real, working temp mail inbox on a custom domain in seconds</strong>, so your personal address stays private. No registration. Works instantly.
Forever free, completely ad-free, and built for speed. Read about our free & ad-free promise and the architecture behind our speed.
How it works
FreeCustom.Email generates disposable email addresses so you can receive emails, verification codes, and sign-up links without using your real inbox. Google Sign-In is used only to save your inbox history and manage your subscription — we never access your Gmail, contacts, or any Google data.
Building something? API Overview →
A temporary email address (also called disposable email or temp mail) is a short-lived inbox you use in place of your real address for sign-ups, trials, and one-off verifications. Once you're done, discard it — no spam, no tracking, no risk. Temp mail is ideal for receiving OTP codes, verification links, and test registrations without exposing your primary inbox. Learn how to create a temp mail address in seconds.
FreeCustom.Email works instantly without an account. Sign in to unlock saved inboxes, attachments, and custom domains.
No account needed. Get an instant temp mail address with 12-hour email storage. No registration required.
Sign in for more control: 24-hour email storage, 1MB attachments, saved inboxes, and a custom email prefix.
Use your own domain (e.g. @your-company.com) as a temporary email address. Get 5GB permanent cloud storage, 25MB attachments, automatic OTP extraction, and full API access.
All domains below support instant disposable email inbox creation and real-time delivery. Using a less-known domain reduces the chance of it being blocked by sign-up forms.
New domains are added regularly. Using a less-known domain reduces the chance of it being blocked by sign-up forms. Need a custom domain for business?
Whether you're a developer testing registration flows, a shopper avoiding marketing lists, or a business running QA — a temp mail address is the cleanest solution. No real inbox needed.
Popular use cases with detailed guides:
Guides
8 verified reviews on G2
Abigail D.
Bookkeeper · Accounting
“Simple, Free Temporary Email with a 12-Hour Inbox and No Sign-Up”
No frills and completely free. Some tools only give you 10 minutes but this is 12 hours. No ads, no sign-up. You can even set browser sound notifications.
Read full review →Verified User
Medical Practice
“Time-Saving Temp Mails That Protect Privacy and Reduce Spam”
Saves a lot of time — no need to create new accounts just for trials. Protects your privacy and helps avoid spam from services that share your email.
Read full review →Aydin T.
Security & Investigations
“Temp-Mail Makes Bulk Sign-Ups Easy”
I love using Temp-Mail for bulk services sign-ups. Nothing to dislike — really all very good.
Read full review →
Prem K.
Entrepreneur
“Fast, Free, and Flawless! The Best Temp Mail Out There”
The ability to create a fully custom, memorable email for free is unmatched. Clean interface, no excessive ads. Emails arrived instantly with real-time notifications.
Read full review →
Douglas F.
Financial Analyst
“Trying out freecustom.email”
Free, no ads, no account required. Very simple and practical. Perfect for free trials so my main email stays clean.
Read full review →Verified User
Construction
“Straightforward, Easy to Navigate, and Smooth Overall”
The platform is straightforward and easily navigable — makes using it easy and not complicated like others. Everything is smooth on my end.
Read full review →Sanya S.
Developer
“FreeCustom.Email”
Choose any alias — meaningful and easy to recall. Loads extremely fast on both mobile and desktop. Lightweight, open source frontend with a public API available.
Read full review →
Sagar K.
Risk Analyst
“Simple, clean, and works as promised”
Super easy to set up and manage custom email domains. Clean UI, no hidden steps.
Read full review →Abigail D.
Bookkeeper · Accounting
“Simple, Free Temporary Email with a 12-Hour Inbox and No Sign-Up”
No frills and completely free. Some tools only give you 10 minutes but this is 12 hours. No ads, no sign-up. You can even set browser sound notifications.
Read full review →Verified User
Medical Practice
“Time-Saving Temp Mails That Protect Privacy and Reduce Spam”
Saves a lot of time — no need to create new accounts just for trials. Protects your privacy and helps avoid spam from services that share your email.
Read full review →Aydin T.
Security & Investigations
“Temp-Mail Makes Bulk Sign-Ups Easy”
I love using Temp-Mail for bulk services sign-ups. Nothing to dislike — really all very good.
Read full review →Prem K.
Entrepreneur
“Fast, Free, and Flawless! The Best Temp Mail Out There”
The ability to create a fully custom, memorable email for free is unmatched. Clean interface, no excessive ads. Emails arrived instantly with real-time notifications.
Read full review →Douglas F.
Financial Analyst
“Trying out freecustom.email”
Free, no ads, no account required. Very simple and practical. Perfect for free trials so my main email stays clean.
Read full review →Verified User
Construction
“Straightforward, Easy to Navigate, and Smooth Overall”
The platform is straightforward and easily navigable — makes using it easy and not complicated like others. Everything is smooth on my end.
Read full review →Sanya S.
Developer
“FreeCustom.Email”
Choose any alias — meaningful and easy to recall. Loads extremely fast on both mobile and desktop. Lightweight, open source frontend with a public API available.
Read full review →Sagar K.
Risk Analyst
“Simple, clean, and works as promised”
Super easy to set up and manage custom email domains. Clean UI, no hidden steps.
Read full review →Reviews collected and verified by G2. View all on G2 →
Independently verified trust scores and directory listings.
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Comparing disposable email APIs for bot automation in 2025 — Guerrilla Mail, Mailinator, Mailosaur, self-hosted, and FreeCustom.Email. Which one actually scales?
Most automation projects fail at the same invisible step — email verification. Here's why it breaks at scale and the stateless fix that actually works.
Test excerpt.
