header.writeTo(buffer, MessageUtils.STRICT_IGNORE);
String s = buffer.toString(MessageUtils.ASCII.name());
assertEquals("Hello: Gr?ezi_z?m?\r\n\r\n", s);
buffer.reset();
try {
header.writeTo(buffer, MessageUtils.STRICT_ERROR);
fail("MimeException should have been thrown");
} catch (MimeException expected) {