What Is an Email Alias? Alias vs Forwarding Explained

Updated 2026-10-12 · TempMailHub Team

An email alias is an extra address that delivers into a mailbox you already have. Someone writes to the alias, the message arrives in your normal inbox, and you never log in to a second account. It is the simplest way to give a website or a person an address that is not your main one.

This guide explains how aliases work, how they differ from email forwarding, the different types, and when each option makes sense.

What is an email alias?

Think of an alias as another name for the same mailbox. Your main address might be hannah.cole@example.com. You could add an alias such as shopping@example.com. Mail sent to either address ends up in the same inbox.

Key points:

• One mailbox. An alias does not create a second inbox with its own password and storage.
• Set up with your provider. Your email host, your domain admin or a privacy service creates it.
• Can be removed. If an alias starts getting spam, you delete it and the main address is unaffected.

Many people use aliases to stop giving their real address to every shop, app and newsletter.

Alias vs forwarding: the difference

The two get mixed up because the outcome looks similar. Mail sent to one address shows up somewhere else. The difference is in how it is built.

A forwarding rule is something you switch on in the settings of the first mailbox. Gmail documents this in its help page on forwarding messages to another account. Forwarding needs the first address to remain a real, working mailbox. An alias does not.

If you only remember one thing: an alias is a second name, and forwarding is a second step.

How an alias works behind the scenes

When a message is sent to an alias, the mail server looks up the address, sees that it belongs to your mailbox and delivers it there. The sender never learns where it went. They see only the alias they wrote to.

Different providers use different methods:

• Provider aliases. Many hosts let you add extra names to one account.
• Domain aliases. If you own a domain, you can create addresses such as orders@yourdomain.com that deliver to one mailbox.
• Plus addressing. Gmail and some other providers treat anything after a plus sign as a tag. Mail to yourname+tag@gmail.com arrives at yourname@gmail.com.
• Alias services. Privacy tools generate random addresses and forward them to your real one. You can turn each off separately.

Types of email alias

Plus aliases. Free and instant on Gmail. Our Gmail dot trick generator can also create dot variants of a Gmail address, and Google explains that dots do not change who receives the mail.

Custom domain aliases. Best if you own a domain and want addresses for different purposes, such as billing and support.

Random aliases from a privacy service. Each website gets a different address. If one leaks, you disable it.

Send-as aliases. Some providers let you also send from the alias, so replies show the alias, not your main address.

What aliases are good for

• Finding out who shared your address. If spam arrives at yourname+newsletter@gmail.com, you know where it came from.
• Filters. You can sort mail automatically by the address it was sent to.
• Keeping the main address cleaner. Give the alias to shops and apps.
• Switching providers. A domain alias keeps working when you change the mailbox behind it.

What aliases are not good for

• True anonymity. The alias still ends in your own inbox, and a provider can link them.
• Throwing away an address. Plus tags can be stripped by some sign-up forms, and the original address still exists.
• Accounts you do not control. If someone else owns the domain, they can remove the alias.

For a short-lived signup you do not want connected to you at all, a disposable inbox is closer to what you need. See email alias vs temp mail for a direct comparison, and is temp mail safe for the risks.

Alias vs forwarding: which one should you use?

Use an alias when you want to hand out different addresses but keep reading everything in one place.

Use forwarding when you are moving from an old address to a new one, or when a mailbox must stay separate but you still want a copy elsewhere.

Use both when you own a domain: aliases for the different purposes, and a forwarding rule to deliver the mailbox to the address you check.

How to set up a Gmail alias in a minute

1. Pick a tag, for example shopping or newsletter.
2. Add it after a plus sign: yourname+shopping@gmail.com.
3. Use that address on the sign-up form.
4. Create a filter that labels mail sent to the tagged address.
5. If a site starts sending spam, block that tag or filter it to trash.

Not every website accepts a plus sign. If a form rejects it, try the dot variation or a different method.

Safety tips

• Aliases are not encryption. Anyone with access to your inbox can read the mail.
• Treat urgent or unexpected messages with caution. The FTC explains how to recognize phishing whatever address the message was sent to.
• Do not reply from your main address if you want to keep it private.

How TempMailHub fits in

TempMailHub is not an alias service. It gives you a separate, receive-only inbox without registration, and mail is kept for up to 30 days before it is deleted. Use an alias for accounts you want to keep, and a temp inbox for a one-time confirmation. Our guide on how to create a temporary email address shows the steps.

Final answer

An email alias is another address for the mailbox you already have. Forwarding is a rule that copies mail to a different mailbox. Choose an alias for everyday privacy and sorting, forwarding for moving mail, and a disposable inbox when you do not want the sign-up tied to you at all.

Related guides

• Email alias vs temp mail: which one to use
• Temp mail forwarding: can it reach your real inbox?
• Stop spam after signing up for free trials

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Frequently asked questions

What is an email alias in simple words?

An email alias is a second address that delivers into a mailbox you already have. People write to the alias, the message lands in your normal inbox, and you do not need to log in to a separate account.

What is the difference between an email alias and email forwarding?

An alias is another name for one mailbox, so there is only one inbox. Forwarding is a rule that copies or moves mail from one mailbox to a different address, so there are two mailboxes involved. In daily use the result looks similar, but the setup and the control you have are different.

Can I reply from an email alias?

It depends on the provider. Some let you pick the alias as the sender address, and some only receive. In Gmail you can add the address under the account's send-mail-as settings. Check your provider's help pages before you rely on it.

Is a Gmail plus address an email alias?

Yes, in practice. An address such as yourname+shop@gmail.com is delivered to yourname@gmail.com, and the part after the plus sign is a tag you can use to sort mail or to see which company shared your address.

Is an email alias the same as a temporary email?

No. An alias forwards into your own inbox and stays under your control. A temporary email is a separate disposable inbox that usually has no password and expires. Our guide on email alias vs temp mail compares them in detail.

Does an email alias hide my real address?

It hides it from the sender only while you do not reply from your real address. If you answer from your main address, the person sees it. Aliases are best for sign-ups and newsletters, not for secrecy.

How many aliases can I have?

There is no single answer. Each provider sets its own limit, and some paid services offer unlimited aliases. A Gmail plus address has no practical limit because you can invent a new tag whenever you want.

When should I not use an alias?

Do not rely on an alias you do not control. If it belongs to a service you might leave, or to a workplace, you can lose mail sent to it. For banking and other important accounts, use your main address.