Released version 4.2.1

🐛 Bug Fixes

• Display names are no longer quoted when they don't need to be (#107). Since 4.2.0 any name outside plain ASCII – so every name with diacritics – got wrapped in a quoted-string before MIME encoding, which buried the quotes inside the base64 payload and decoded them as part of the name: Objednávky domena.cz arrived as "Objednávky domena.cz". Quoting is now reserved for characters that could genuinely restructure an address list (, ; : < > @ " \), so Kdo uteče, obědvá keeps its quotes and the DKIM fix from #102 stands, while ordinary accented names go out clean.