The key to reaching inboxes is using valid email addresses. In this article, we’ll explore the factors that determine email validity and how to perform email verification.
What makes an email address valid:
How to check if an email address is valid:
What makes an email address valid
What determines the validity of an email? Let’s dig deeper into the factors that define a valid email address.
Factor #1: Email address format
A valid email address consists of two main components: the username and the domain name.
Username (before @) identifies the email address user with a unique name. Domain name (after @) represents the email provider or organization hosting the email account.
So, a valid email address follows the format: username@domain.com. However, there are specific requirements for acceptable usernames and domain formats.
| Component | Syntax requirements | Valid email format examples |
|---|---|---|
| Username | Allowed characters:
A period (.) is not permitted at the start or end. Consecutive periods or special characters (e.g., john…doe@company.com) are not allowed. Special characters should be followed by one or more letters or numbers. |
j-doe1234@domain.com
sarah.smith85@domain.com jessy_luther@domain.com my.email123@domain.com sales@domain.com |
| Domain name | Consists of one or more parts separated by a dot.
The second part must be at least two characters, for example: .com, .org, .cc Allowed characters:
|
username@domain.org username@mail-provider.cc username@example.net username@companywebsite.com username@techcompany.com |
Factor #2: Email address authentication
Not all email addresses that are correctly formatted are automatically considered valid. The most important factor is that the email address actually exists and is active on the mail server.
This is confirmed through authentication, a process that ensures the email address is legitimate and verifies its existence on the mail server.
It involves checking the email address by verifying its domain through MX records and authenticating the email account using SMTP server commands to confirm its active status and ability to receive emails.
How to check if an email address is valid
There are few methods to check the validity of an email depending on the number of emails you need to verify.
Method 1: Single Email Verification
This method is suitable for you if you only need to verify one or a few emails.
- Send a test email manually:
You can verify an email by sending a message to it from your email client and checking if it bounces back or delivered successfully.
You can enter an email address into the verification form and see its status without the need to manually send an email. This method prevents any potential harm to your sender reputation.
Method 2: Bulk Email Verification
This method lets you to check multiple emails at once or verify a large number of emails by uploading a list.
Our bulk email verifier can help you run verification checks on your entire email list in bulk and remove any invalid addresses from your list.
It includes syntax checks, MX record checks, SMTP authentication, and other tests for maximum verification accuracy.
Learn more in our guide on how to verify a list of email addresses with Snov.io.
Read next:
Keeping your email list clean helps minimize the number of bounces you get, improve your sender reputation and deliverability.
If you’re facing high bounce rates and poor lead quality, we have a solution for you outlined in our Sales Cheats resource – a complete roadmap on how to fix the most common problems in the sales process and improve your outreach results.
Our email finder tools help you find accurate, pre-verified emails and build lists for your campaigns.
Once you have a list of valid emails, you can create personalized multichannel campaigns to reach your potential clients.