nc unix_listen .test-sock
mda |= ./mda-lmtp --addr=.test-sock --addr_network=unix \
-to_puny -f fröm -d þo < test-email
nc -> 220 Hola desde expect
nc <~ LHLO .*
nc -> 250-Bienvenido!
nc -> 250 Contame...
nc <- MAIL FROM:<xn--frm-tna>
nc -> 250 Aja
nc <- RCPT TO:<xn--o-hha>
nc -> 250 Aja
nc <- DATA
nc -> 354 Dale
nc <- Subject: test
nc <-
nc <- This is a test.
nc <- .
nc -> 250 Recibido
nc <- QUIT
nc -> 221 Chauchas
mda wait 0