Does caps matter in mail id

In most cases, the answer is no, capitalization does not matter in email addresses. This is because email addresses are case-insensitive, meaning that the same email address can be written in different ways, with varying capitalization, and still be recognized as the same address.

For example:

However, there are a few exceptions and considerations to keep in mind:

  1. Domain name systems (DNS): While email addresses are case-insensitive, the domain name system (DNS) that resolves domain names to IP addresses is case-sensitive. This means that if you have a domain name with mixed case (e.g., example.com), you may need to use the same capitalization when sending emails to addresses within that domain.
  2. Email clients and servers: Some email clients and servers may be more strict about capitalization than others. For example, some email clients may not recognize an email address with mixed case if the server is configured to be case-sensitive.
  3. Username and password: When logging in to an email account, the username and password are typically case-sensitive. Make sure to use the correct capitalization when entering your login credentials.
  4. Email address validation: Some email address validation tools or services may be more strict about capitalization than others. If you're using an email address validation service, it's a good idea to check their documentation to see if they have specific requirements for capitalization.

In general, it's a good practice to use the same capitalization when sending and receiving emails to avoid any potential issues. However, in most cases, the capitalization of an email address does not affect its functionality or deliverability.