@Override
    public int read(final byte[] b) throws IOException {
        return this.read(b, 0, b.length);
    }
Returns a formatted TCP-info element, depending on the success of the IP
address name resolution either with domain name or only the address literal.

@param host the address of the remote SMTP client.
@return the formatted TCP-info element as defined by RFC 5321
src/main/java/de/gessnerfl/fakesmtp/smtp/io/ReceivedHeaderStream.java