IsDomainValid checks if a domain is valid.

IsMailboxValid checks if a mailbox name is valid.

IsValid checks if an email address is valid.

Parse parses an email address into it's sections.

ErrExceedsMaximumLength is an error for an address that exceeds the maximum length.

ErrInvalidDomain is an error for an invalid domain.

ErrInvalidMailbox is an error for an invalid mailbox.

ErrMalformedAddress is an error for a malformed address.