Easily create multiple email addresses from one email address! Useful ways to use Gmail

Hello.
I'm Nomusin, the smartphone specialist on the development team.

When developing an app or system, you may need multiple email addresses for testing purposes, right?

There are services that allow you to easily create disposable email addresses, but
this time we will introduce a simple trick to easily create multiple addresses from one address using Gmail.

It's not a particularly new technique, but if you're not familiar with it, I highly recommend giving it a try

 

What you need

・Gmail address ×1

Yes, that's it!

This time, we will use
[email protected] If you send an email to this address, it will actually be delivered to Nomushin, but please refrain from sending prank emails.

 

Method 1: @googlemail.com

The Gmail address is " [email protected] ", but you can actually also receive it at "googlemail.com" .

you send it to "[email protected] it will arrive at [email protected]

Now you have two email addresses instead of one!

 

Method 2: Period propagation method

Gmail ignores the period (also called a dot) before the @ .

What this means is that any email you send to the addresses below will be delivered to [email protected]

• nomyuki.beyond @gmail.com
• nom.yuki.beyond @gmail.com
• [email protected]​

However, you cannot have two or more consecutive dots or a dot immediately before the @ sign. For example,
" [email protected] " or " [email protected] " are not allowed.

However, please note that this is not a Gmail restriction, but is determined as a general rule (RFC) for email addresses

Using this method, you should be able to generate a lot of email addresses...!

The information about this period is also written in Gmail Help

 

Method 3: Plus Append Method (Alias)

Even if you can add dots to increase the number of email addresses, there's a limit!
For those of you who think this, we'll teach you one last method.

To do this, simply add "+ (plus) and any string of characters" after the account name .

even if you specify an address such as "nomyukibeyond +nomurahaimatotemonemui.zzz will still be delivered to [email protected]

n't delve too deeply into the words you added.

This method allows you to generate an infinite number of email addresses

This account extension using + is a feature called Gmail aliases , which allows you to add categories to your address to make it easier to classify emails.

 

By the way, you can combine methods 1 to 3.
"[email protected]" also works fine.
... It's quite annoying.

 

Bonus: Email address rules

Some people may wonder, "Is it okay to use a + (plus) sign in an email address?"
According to the RFC definition mentioned briefly in Method 2, it is "OK to use it."

The original text of the RFC is quite long, so Wikipedia , the characters that can be used in emails as defined in the RFC are as follows:

- Uppercase and lowercase Latin letters (although they are case-sensitive, most implementations do not distinguish between uppercase and lowercase. They are generally written in lowercase.)

・Numbers

・! # $ % & ' * + - / = ? ^ _ ` { | } ~(In reality, providers often limit the number of symbols that can be used.)

- Period ( . ) (Can be used anywhere except at the beginning or end. Cannot contain more than two consecutive periods.)

Regarding the capital and small letters in the Latin alphabet (alphabet) notes, it seems that Gmail doesn't distinguish between uppercase and lowercase.
, even if you send an email to "nomyuki BEYOND [email protected] ".

There are also a surprising number of symbols that can be used.
However, as noted, even if something is OK according to the RFC definition, there are many cases where it is restricted by the provider that actually handles sending and receiving emails, so it may be best to limit the use of symbols such as - _ .

 

summary

So, if you already know all the methods introduced this time, you must be a Gmail expert, right?
If you dig deeper into Gmail, you'll find a lot of useful features.
It would be a waste to just use it the same way as your regular email provider!
If you're interested, it might be fun to look into it.

lastly

I have launched a system development service site called "SEKARAKU Lab," which I work for.
Beyond can handle everything from server design and construction to operation, so if you have any problems with server-side development, please feel free to contact us.
SEKARAKU Lab: https://sekarakulab.beyondjapan.com/

See you next time!