Why Using Your Gmail Address as Your Username is a Bad Idea

April 04, 2020

Gmail, or Google Mail, was famously announced on April 1, 2004. April Fool’s Day. Free email with unlimited storage. Initially you had to be invited to get an account. I desperately wanted to have a Gmail account and finally managed to cage an invitation through Matt Haughey, whom I knew of through his web site A Whole Lotta Nothing. I got my first Gmail address in June 2004, and I’ve been using it to one degree or another ever since.

There are email standards. One of those standards is that, while the local part of your address - the bit preceding the at sign - can contain a dot (.), the dot cannot be the first or last character, and it cannot be repeated, e.g, joe..user@example.com. The local part of the address needs to be unique with in the domain. You can’t have two bob@example.com email addresses that go to two different people.

Google breaks this rule in a subtle way. They allow any and all variations, involving dots, of your local part to resolve as your account. An example will make this clearer. Joe User signs up with Gmail. He picks joe.user@gmail.com as his address. He will get mail addressed to joe.user@gmail.com. He will also get the email addressed to any of these variations:


And so on. Google says “dots don’t matter in Gmail addresses”.

If someone accidentally adds dots to your address when emailing you, you’ll still get that email.

On the surface, this is a nice idea, but in implementation it proves to be massively annoying.

Why Standards are Important

By not following the email standard for unique local parts to email addresses, Google has set a trap for every other Internet business who allows email addresses to be used as user account names. Unless the developers at Example Incorporated code their user on-boarding process to prevent any variation of an established account, using Gmail as the username, where the variation involves adding or subtracting dots within the local part of the address, then they will end up allowing what appear to be two (or more) distinct accounts to be created on their site, the resolve to only one Gmail address.

For example: Joe User signs up at PayPal using his joe.user@gmail.com email address for the username. He adds his phone number and sets a password and he is good to go. Then one day he gets an email stating, “You added your phone number to your account”, which lists a phone number poor Joe has never seen before.

PayPal allowed another person named Joseph User to create an account using joeuser@gmail.com as the username. To PayPal the two accounts are unique. joe.user is different than joeuser. Unfortunately, Google sees joe.user and joeuser as variations on the same email account. Joe User will now get emails from PayPal that are meant for Joseph User. Joseph won’t understand why he isn’t getting his PayPal emails.

Because additional information is needed to reset the password for the other account, and the prompts for that information obscure the alternate contact information for the other user (which is good), there is no way to reach out to the other user to let them know that their email address isn’t what they think it is - unless that other email address is Googlable enough to find out enough information to try to contact the other user via other means.

My Approach to this Mess

My name is not that uncommon. There are several other people in my town of 53,000 who share my first and last name. I have no idea how many people nationwide are named Mark Nichols. I do know that there are enough that I get a continuous stream of emails using the dot-less variation of my Gmail address. I get hotel reservation confirmations and bill folios. I get reminders of dental appointments, and car service appointments. I get emailed copies of Lowe’s purchase receipts. I get access to shared Google Docs, and invitations to weddings and other events. All because someone at Google 16 years ago though it would be cool to “save people from typos” and decided to allow email address local parts to be non-unique within the gmail.com domain.

Since there is no way every other business, organization, what have you, on the Internet is going to carefully vet email addresses used as usernames to ensure that two seemingly unique Gmail addresses aren’t in fact merely dot variations, then you should not use your Gmail address as a username. You’ll still get emails sent to dot variations of your address, but if you know your account username is NOT your Gmail address, then you won’t have momentary panic when you get an email confirming your week long hotel stay in Miami.

I’m starting the tedious process of visiting each online account that uses my Gmail address for the user name, and changing that user name (if possible) and changing the associated email address. Fortunately I have all of my accounts stored in a password manager, so I should be able to identify 99% of them.

I’m retiring my Gmail account as the email I use to sign up for things. I’ll create a new account on my personal domain for that. Hopefully this will prevent 30 minutes of late night panic about an email from PayPal announcing that I’ve added a phone number to my account that I’ve never seen before.

Author's profile picture

Mark H. Nichols

I am a husband, cellist, code prole, nerd, technologist, and all around good guy living and working in fly-over country. You should follow me on Twitter.