public function email_list() {
			$value = trim( $this->value );
			$this->result->valid = true;
			$sanitized_emails = [];

			// Break emails into an array.
			$emails = preg_split( '/[,;]+/', $value );

			foreach ( $emails as $email ) {
				// In case there's a blank email or extra comma/semicolon, skip with no error.
				if ( empty( $email ) ) {
					continue;
				}

				// Sanitized email returns blank if invalid.
				$email = sanitize_email( trim( $email ) );
				if ( empty( $email ) ) {
					$this->result->valid = false;
					break;
				}
				$sanitized_emails[] = $email;
			}

			// If any of the emails are invalid, throw an error.
			if ( ! $this->result->valid ) {
				$this->result->error = sprintf(
					// Translators: %s - Label of the form input field.
					esc_html__( '%s must be a list of valid email addresses separated by commas or semicolons.', 'tribe-common' ),
					$this->label
				);
			} else {
				$this->value = implode( ', ', $sanitized_emails );
			}
		}