Valid email address rules

Here are the valid email address rules:

1. Local Part: The local part is the part of the email address that comes before the @ symbol. It can contain:

• Letters (a-z, A-Z)
• Numbers (0-9)
• Dots (.)
• Hyphens (-)
• Underscores (_)
• The length of the local part can be between 1 and 64 characters.

2. Domain: The domain is the part of the email address that comes after the @ symbol. It can contain:

• Letters (a-z, A-Z)
• Numbers (0-9)
• Dots (.)
• Hyphens (-)
• The length of the domain can be between 1 and 253 characters.

3. Top-Level Domain (TLD): The TLD is the part of the domain that comes after the last dot (.) in the domain name. It can contain:

• Letters (a-z, A-Z)
• Numbers (0-9)
• The length of the TLD can be between 1 and 6 characters.

4. Email Address Format: The email address format is:

• [email protected]

5. Special Characters: The following special characters are allowed in an email address:

• @ (at symbol)
• . (dot)
• - (hyphen)
• _ (underscore)

6. Invalid Characters: The following characters are not allowed in an email address:

• Space characters
• Quotes (")
• Commas (,)
• Colons (:)
• Semicolons (;)
• Equals signs (=)
• Plus signs (+)
• Backslashes ()
• Forward slashes (/)

7. Internationalized Domain Names (IDNs): IDNs allow non-ASCII characters in domain names. They are allowed in email addresses, but the email client must be able to handle them correctly.

8. Email Address Length: The maximum length of an email address is 254 characters.

9. Email Address Syntax: The email address syntax is defined by the following rules:

• The local part can contain any characters except for the @ symbol.
• The domain can contain any characters except for the @ symbol.
• The TLD can contain any characters except for the @ symbol.

By following these rules, you can create a valid email address that is compliant with the standard email address format.