Reference number: CH001081

Are e-mail addresses case sensitive?

Question:

Are e-mail addresses case sensitive?

Answer:

If you're uncertain if an e-mail address is case sensitive it's safe to assume it's not.

Typically most Internet Service Providers (ISPs) and e-mail servers are not case sensitive, which means SUPPORT@computerhope.com is the same as support@computerhope.com. However, the first portion of an e-mail address (alias/username/group) can be case sensitive. This means if the server is case sensitive, logins SUPPORT, Support, support, and SUPport would all be considered different users and each of those users would have different e-mail addresses.

Additional information:

• See our e-mail definition for additional information about each of these commands.