0.21.2

go-smtp v0.21.2

Mathias Lieber (1):
      Add remote addr in error handler log

Simon Ser (8):
      server: fix failingListener data race in tests
      server: fix TestServerAcceptErrorHandling data race
      ci: switch to alpine/latest
      ci: enable data race detector
      ci: add gofmt check
      client: fix server responses in TestClient_TooLongLine
      client: add Client.readResponse helper
      server: unify logic to decode SASL response

diogomr (1):
      Do not use HELLO as fallback of EHLO when server responds with 421