Temp Mail vs Guerrilla Mail vs Yopmail: Which Wins?

Temp Mail, Guerrilla Mail, and Yopmail are three of the most recognized names in the disposable email space. They have been serving millions of users collectively for years, each with a different take on the same fundamental problem: how to get a throwaway email address without signing up for anything.

On the surface, they look interchangeable. Visit any of the three, get an inbox, receive an email, move on. But beneath that surface, they approach disposable email in meaningfully different ways -- different privacy models, different feature sets, different interface philosophies, and different trade-offs. The "best" one depends entirely on what you need, and understanding those differences can save you from choosing the wrong tool for your specific situation.

This guide provides a detailed head-to-head comparison of all three services, examines how they stack up against modern alternatives, and helps you determine which option fits your use case.

The Three Services in Detail

Yopmail: The Persistent Public Inbox

Yopmail launched in 2004, making it the oldest of the three. Its defining characteristic is user-chosen addresses with cross-session persistence. You type any username at @yopmail.com, and that inbox exists immediately. Come back tomorrow, next week, or eight days later, and the inbox is still there with its messages intact.

How it works: Navigate to yopmail.com, type a username, and you have an inbox. No randomization, no sessions. You choose the address and can return to it anytime. Messages are retained for approximately 8 days before automatic deletion.

Strengths:

• Choose your own address (memorable, reusable)
• Return to the same inbox across sessions and devices
• Approximately 8-day message retention (longest of the three)
• Simple, zero-friction experience
• Multiple language support

Weaknesses:

• Receive-only (cannot send or reply)
• Fully public (anyone who types the same username sees the same inbox)
• Among the most widely blocklisted disposable email domains
• Dated interface with no modern features
• No IMAP, SMTP, API, or mobile optimization
• No privacy layer of any kind

Technical details: Yopmail operates several alternate domains beyond @yopmail.com, but most are equally blocklisted. The service runs a simple web-based inbox viewer with no API or protocol access. According to community-maintained blocklists like the disposable email domains repository, Yopmail's domains are among the most comprehensively listed.

Temp Mail: The Mobile-First Random Inbox

Temp Mail (temp-mail.org) has grown to become one of the most popular disposable email services, largely due to its clean, mobile-first design. Unlike Yopmail, it generates a random address automatically and ties it to your browser session.

How it works: Visit temp-mail.org, and a random email address is immediately generated. No input required. The inbox persists for your browser session and disappears when you leave or manually reset. New random addresses are available at the click of a button.

Strengths:

• Best mobile experience among the three services
• Automatic random address (zero decisions required)
• Clean, modern interface with real-time updates
• Session-based isolation (no one else sees your inbox during your session)
• Multiple domain rotation
• Copy-to-clipboard functionality for easy use on mobile

Weaknesses:

• Receive-only (cannot send or reply)
• Session-based only (close the tab and everything is gone permanently)
• No cross-session persistence
• No address choice (random only)
• No privacy beyond session isolation
• Domains frequently blocklisted

Technical details: Temp Mail rotates through multiple domains and generates addresses using random alphanumeric strings. The session is typically maintained via browser cookies and local storage. There is no API, no IMAP access, and no way to programmatically interact with the service.

Guerrilla Mail: The One That Can Send

Guerrilla Mail (guerrillamail.com) has been operating since 2006. Its defining feature is sending capability -- you can compose and send emails from a disposable address without creating an account. Most disposable email services are strictly receive-only, which makes Guerrilla Mail unique in this comparison.

How it works: Visit guerrillamail.com and you get an instant inbox. A random address is assigned but you can customize the username. You can receive emails and, critically, compose and send new messages from the disposable address.

Strengths:

• Can send emails (unique among the three)
• No signup or account required
• Long operational track record (since 2006)
• Multiple domain options
• Open source SMTP server component
• Can customize the username portion of the address

Weaknesses:

• Fully public inboxes (anyone can read any inbox)
• Sending deliverability is unreliable
• Cluttered, dated interface (worst of the three)
• Domains frequently blocklisted
• Limited message retention
• Poor mobile experience

Technical details: Guerrilla Mail's outbound sending goes through its own SMTP infrastructure, which lacks the authentication mechanisms (SPF, DKIM, DMARC) that modern receiving servers expect. This means messages sent from Guerrilla Mail frequently land in spam folders or are rejected entirely. The open source go-guerrilla SMTP server is available on GitHub.

Head-to-Head Matchups

Yopmail vs Temp Mail

Both are receive-only and share the fundamental limitation of public or session-based access. The key differences lie in the experience model.

Address control: Yopmail lets you choose your address; Temp Mail assigns a random one. If you want [email protected] as a memorable throwaway, Yopmail delivers that. Temp Mail gives you something like [email protected] with no option to choose.

Persistence: Yopmail retains messages for approximately 8 days with cross-session access. Temp Mail ties everything to your browser session -- close the tab and the inbox is permanently gone. This is Yopmail's biggest practical advantage.

Mobile experience: Temp Mail wins by a wide margin. Its interface is designed mobile-first with responsive layouts, touch-friendly controls, and real-time updates. Yopmail's interface feels dated on any device and is particularly awkward on mobile screens.

Privacy model: Neither offers real privacy. Yopmail inboxes are fully public -- anyone who types the same username sees the same messages. Temp Mail offers session isolation, meaning the inbox is tied to your browser session and not directly accessible to others, but this is security through session management rather than true access control.

Blocklist status: Both are widely blocklisted, though the specific domains affected vary. Yopmail, being older, tends to be on more blocklists.

Verdict: Pick Yopmail if you want to choose your address or come back later. Pick Temp Mail if you are on your phone and want the fastest path to an inbox.

Yopmail vs Guerrilla Mail

The primary difference is sending capability. Guerrilla Mail can send; Yopmail cannot.

Feature set: Guerrilla Mail offers both sending and receiving, making it functionally more capable. Yopmail is strictly receive-only but offers address choice and cross-session persistence that Guerrilla Mail partially matches (you can customize the username but the experience is less seamless).

Interface quality: Yopmail's interface is dated but clean enough. Guerrilla Mail's interface is cluttered, confusing for first-time users, and significantly worse on mobile.

Blocklist status: Both are heavily blocklisted. Yopmail is blocked by more services overall due to its age, but Guerrilla Mail's domains are well-represented on blocklists too.

Verdict: Pick Yopmail if you only need to receive. Pick Guerrilla Mail if you need to send a quick email from a throwaway address.

Temp Mail vs Guerrilla Mail

This matchup pits the best interface against the most features.

UX quality: Temp Mail offers a dramatically better experience, especially on mobile. Clean, fast, intuitive. Guerrilla Mail's interface feels like navigating a cluttered dashboard with poor mobile responsiveness.

Feature set: Guerrilla Mail can send. Temp Mail cannot. This is the only meaningful feature advantage Guerrilla Mail holds.

Privacy: Temp Mail's session-based model provides slightly better isolation than Guerrilla Mail's fully public inboxes. With Guerrilla Mail, anyone who knows the address can read the inbox at any time. With Temp Mail, the inbox is tied to your session.

Verdict: Pick Temp Mail for a clean receive-only experience, especially on mobile. Pick Guerrilla Mail if sending capability outweighs everything else. For a detailed look at Guerrilla Mail alternatives, see our Guerrilla Mail alternatives comparison.

The Winner Depends on Your Use Case

Use Case	Winner	Why
Quick verification on mobile	Temp Mail	Best mobile UX, zero setup
Choose your own address	Yopmail	Only one that lets you pick the username
Come back to inbox later	Yopmail	8-day retention, cross-session access
Need to send an email	Guerrilla Mail	Only one with sending capability
Cleanest interface	Temp Mail	Modern, mobile-first design
Longest retention	Yopmail	~8 days vs session-based
Best session privacy	Temp Mail	Session isolation vs fully public
Quick desktop use	Yopmail	Address choice and persistence

None of these three services offer password-protected privacy, custom domains, long-term retention beyond 8 days, full email sending with IMAP/SMTP, or reliable acceptance on sites that maintain disposable email blocklists.

Where All Three Fall Short

Despite their individual strengths, Temp Mail, Guerrilla Mail, and Yopmail share fundamental limitations that no amount of choosing between them can solve.

No real privacy. Yopmail and Guerrilla Mail have fully public inboxes. Temp Mail has session-based isolation that disappears when you close the tab. None of them offer password protection or authentication. According to the Electronic Frontier Foundation's privacy guidance, using disposable email is a valid privacy practice -- but the privacy benefit is limited when the inbox itself is either publicly accessible or ephemeral.

Blocklisting is getting worse, not better. All three services face increasing domain blocklisting. As NIST's guidelines on digital identity influence more services to verify email authenticity, disposable email domains are rejected more aggressively. What works today may not work next month.

No sending (except Guerrilla Mail's unreliable version). Two of the three are receive-only. Guerrilla Mail's sending exists but is unreliable -- messages frequently land in spam or are rejected by receiving servers.

No integration or automation. None of the three offer IMAP, SMTP, API access, or any way to programmatically interact with messages. They are web-only tools.

Short retention. Yopmail retains messages for about 8 days. Temp Mail retains them for your session. Guerrilla Mail offers limited retention measured in hours. For any use case requiring message access beyond a few days, all three fall short.

The Alternative That Addresses the Gaps

Reusable.Email covers the strengths of all three services and adds capabilities none of them offer.

Reusable.Email's public inbox does what Yopmail does -- choose an address, use it instantly, return across sessions -- but with 90-day retention instead of 8 days and lower blocklist exposure. For one-time verifications, the experience is identical.

Reusable.Email's private inbox (free) adds what none of the three offer: password-protected inboxes with 180-day retention. This is genuine privacy through access control, not public access or ephemeral sessions.

Reusable.Email's managed inbox ($3 one-time) replaces Guerrilla Mail's unreliable sending with full SMTP capability. Connect any email client via IMAP (imap.reusable.email:993) and SMTP (smtp.reusable.email:587). Send, reply, organize with folders, and retain messages for 365 days.

Custom domains ($10/year) solve the blocklist problem permanently. When you own the domain, it does not appear on any disposable email blocklist. This is the only reliable long-term solution to the increasing blocklist coverage that affects all three services.

Comprehensive Comparison Table

Feature	Yopmail	Temp Mail	Guerrilla Mail	Reusable.Email Public	Reusable.Email Private	Reusable.Email Managed
Choose address	Yes	No (random)	Partial	Yes	Yes	Yes
Sending	No	No	Limited	No	No	Full SMTP
Privacy	Public	Session	Public	Public	Password-protected	Full account
Retention	~8 days	Session	Limited	90 days	180 days	365 days
Custom domain	No	No	No	No	No	Yes ($10/yr)
IMAP/SMTP	No	No	No	No	No	Yes
Mobile UX	Dated	Excellent	Poor	Good	Good	Good
Cost	Free	Free	Free	Free	Free	$3 one-time
Blocklist risk	Very high	High	High	Lower	Lower	Lower
Signup required	No	No	No	No	No	One-time setup
Cross-session	Yes	No	Partial	Yes	Yes	Yes

For deeper comparisons of individual services, see our Yopmail alternatives guide and 10 Minute Mail alternatives.

Understanding the Blocklist Arms Race

All three services -- and every other disposable email service -- face the same structural problem: the more popular a service becomes, the more likely its domains are to be blocklisted by the sites users want to sign up for.

This creates a cycle:

1. A disposable email service operates successfully
2. Abusers use it for spam, fake accounts, and fraud
3. Service providers add the domains to their blocklists
4. The disposable email service registers new domains
5. Those new domains work for a while, then get blocked
6. The cycle repeats

Yopmail, as the oldest of the three (2004), has the highest blocklist coverage. Guerrilla Mail (2006) is not far behind. Temp Mail benefits from more aggressive domain rotation, but its most popular domains are well-known to blocklist maintainers.

There are two ways to escape this cycle:

1. Use a service with lower current blocklist coverage. This is a temporary advantage. Newer or less well-known services work on more sites right now, but their domains will eventually be added to blocklists as they gain popularity.

2. Use a custom domain. This is the permanent solution. If you own the domain, it will not appear on any disposable email blocklist. Reusable.Email's custom domain support at $10 per year provides the most accessible path to this solution. For more on this approach, see our custom domain email guide.

Practical Recommendations

If you just need a quick inbox on your phone: Start with Temp Mail. Its mobile experience is the best in the category.

If you want to choose your own address and come back later: Start with Yopmail. Its address choice and cross-session persistence are unmatched among free disposable services.

If you need to send from a throwaway address: Guerrilla Mail works for basic sending, but be aware that deliverability is poor. For reliable sending, Reusable.Email's managed inbox at $3 one-time provides full SMTP.

If you need privacy: None of the Big Three provide it. Reusable.Email's free private inbox is the only password-protected disposable email option available at no cost.

If you keep getting blocked: The Big Three are all heavily blocklisted. Reusable.Email's domains currently have lower blocklist coverage, and custom domains at $10/year eliminate the problem permanently.

If you are a developer testing email: None of the Big Three are suitable for development testing. Consider Reusable.Email managed inboxes for real IMAP/SMTP testing, or self-hosted tools like smtp4dev for local capture. See our email API for developers guide for more.

Bottom Line

Yopmail, Temp Mail, and Guerrilla Mail each do their specific jobs. If one of them works for what you need, there is no reason to switch. Yopmail for reusable throwaway addresses with persistence. Temp Mail for quick mobile use with the cleanest interface. Guerrilla Mail for basic sending from a throwaway address.

When you need more -- privacy, reliable sending, persistence beyond a few days, acceptance on sites that block the Big Three, or development-grade email testing -- the alternatives fill the gaps. For a full comparison of all the major services including additional options, see our best temporary email services guide. For a broader overview of how disposable email fits into your privacy toolkit, check out our complete disposable email guide.

FAQ

Which is better, Temp Mail or Yopmail?

It depends on your priorities. Temp Mail provides a better mobile experience with zero setup (random address, instant use). Yopmail provides address choice, cross-session persistence, and approximately 8-day retention. For quick mobile verifications, Temp Mail wins. For choosing your own address and returning to check it later, Yopmail wins. Both are receive-only and both are heavily blocklisted.

Can Guerrilla Mail really send emails?

Yes, Guerrilla Mail can compose and send outbound emails. However, deliverability is unreliable. Many receiving mail servers flag or reject emails from Guerrilla Mail's IP addresses because they lack proper SPF, DKIM, and DMARC authentication. Messages frequently land in spam folders. For reliable sending from a disposable address, Reusable.Email's managed inbox provides full SMTP with proper authentication at a $3 one-time cost.

Are these services safe to use?

These services are safe in the sense that they do not require personal information. However, none of the three provide real privacy. Yopmail and Guerrilla Mail inboxes are fully public -- anyone can read them. Temp Mail inboxes are session-based, providing some isolation but no authentication. Do not use any of these services for sensitive communications, password resets for important accounts, or anything containing personally identifiable information.

Why do so many websites block these disposable email services?

Websites block disposable email domains to prevent abuse, including spam account creation, fraudulent signups, and violation of terms of service. Service providers maintain and share blocklists of known disposable email domains. Older services like Yopmail and Guerrilla Mail are on virtually every blocklist. The most reliable way to avoid blocks is using a custom domain, which will not appear on disposable email blocklists.

What is the most private disposable email service?

Among Temp Mail, Guerrilla Mail, and Yopmail, none provide genuine privacy. Reusable.Email's free private inbox offers password-protected access, making it the most private free disposable email option. For maximum privacy with encryption, services like ProtonMail and Tutanota provide end-to-end encryption but require account creation and are not designed for disposable use.