Whenever you sign up for a free trial or try something new online, you may start getting spam and marketing emails because your personal email is out there. Once you use a temporary email for short-term needs, you’ll think, “Why didn’t I do this before?”
A fake email is a short-term email address that you can use to receive messages. The validity of these email addresses depends on the provider's retention policy.
When you use your personal email address on a website you don't trust, they can start sending you marketing, promotional, or spam emails. With a disposable email, you get what you need without receiving marketing, spam, or promotional emails in your primary inbox.

These services use a set of domains and custom mail servers to generate random addresses.
Each address remains active for a set time, for example, from 10 minutes to a couple of days, depending on the provider's retention policy.
The provider's server may also delete all messages it receives, and they may not be recoverable.
In temporary email services, the expiration behavior for addresses, inboxes, and received messages may vary.

There are many useful reasons to use fake email addresses; some of them are listed below.
Many US shopping websites, blogs, and online services let users subscribe to newsletters. If you just want to check a specific promotional offer or newsletter, a fake email address can help. This keeps your personal inbox free of unnecessary marketing emails.
Many US software companies offer a trial period, but they may ask you to confirm your email address. You can use a temporary email address if they accept it. However, for account recovery and long-term access, use a permanent email address.
In the US, people shop at Amazon, Walmart, Target, and other online stores. Many retailers offer promotional deals and discount codes when you sign up for their newsletters. In these cases, using a fake email address can keep promotional emails out of your personal inbox, as long as the retailer accepts disposable email addresses.
Some US websites require an email address to download a free document, to access free resources, or to register for an event. If you just need the account once, a free temporary email address can help you to download, access, or register without sharing your personal email.
Many giveaways and contests are offered by brands and websites in the US. If the brand or the website accepts fake email addresses, a temporary email can help reduce marketing messages in your personal inbox. However, organizers may contact winners later, and you can’t receive messages at an expired address.
Temporary email addresses also help programmers, developers, and testers. For instance, if a developer wants to test a registration form, an email verification system, or welcome email functionality, they can use a temporary email address to confirm messages are received correctly. But don't rely solely on temporary email services for critical testing because temporary email providers may hold, block, or delete some of the messages. For testing long-term email delivery or account recovery processes, a dedicated test inbox is a more suitable option.
The purpose of a temporary (or "fake") email address is not to deceive anyone, but rather to protect your personal email address from unwanted spam, promotional emails, and unsolicited newsletters. LiveTempMail can help you to register on an unfamiliar website, try an online service, access a short-term free trial, or simply protect your privacy. However, for important or long-term accounts, it is best to use your permanent email address.