c tls_connect localhost:1465

c <~ 220
c -> EHLO localhost
c <... 250 HELP

c -> AUTH PLAIN something
c <~ 535
c -> AUTH PLAIN something
c <~ 535
c -> AUTH PLAIN something
c <~ 535
c -> AUTH PLAIN something
c <~ 535
c -> AUTH PLAIN something
c <~ 503 Too many attempts - go away