Check Email Format is a key part of front-end form testing. Without it, users can enter any sequence of characters in your form, making it very difficult for you to determine if they are trying to sign up for your newsletter or buy something from your site. Email format validation helps ensure that your emails are properly formatted and are sent to genuine recipients. This can enhance deliverability rates and help you avoid bouncing your messages back to you or being added to spam or blacklists.

Check Email Format: Ensuring Compliance for Successful Delivery

Basic form validation uses Javascript to check the syntax of an input field. This includes the structure and formatting of an email address, which must consist of a regional prefix (or username), an @ symbol, a domain name, and a top-level domain like.com,.org,.cc,.biz, or.info. This basic method of checking form data is relatively straightforward, and you can use it on a number of different forms.

However, it’s not as precise as you might hope and can allow some low-quality addresses to pass. For example, it’s easy for people and bots to create valid email addresses that have the same syntax as a real one but belong to full mailboxes or contain typos.

A more powerful and sophisticated method of checking email formats is to use regular expressions (regex) to validate the structure of an email address. Using a regex, you can validate that an email address has the correct format and adheres to common standards.