Hyphen in email address unix

In Unix, the hyphen (-) is a special character that has a specific meaning in file names and paths. However, in email addresses, the hyphen is allowed and is not considered a special character.

In fact, the hyphen is one of the allowed characters in an email address, as specified in RFC 5322, which defines the format of email addresses. According to the standard, an email address can contain the following characters:

• Letters (a-z, A-Z)
• Digits (0-9)
• Special characters (! # $ % & ' * + - / =? ^ _ ` { | } ~)
• Periods (.)
• Hyphens (-)

So, if you have an email address with a hyphen, such as [email protected], it is perfectly valid and can be used to send and receive emails.

It's worth noting that some email providers or systems may have specific rules or restrictions on the use of hyphens in email addresses, so it's always a good idea to check with your email provider if you have any doubts.