Debugger entered--Lisp error: (file-error "writing to process" "transport endpoint is not connected" #<process idna>)
  process-send-string(#<process idna> "gmail.com\n")
  (if (null proc) (error "Cannot start idn application (to-ascii)") (idna-to-ascii-response-clear) (process-send-string proc (concat str "\n")) (setq string (idna-to-ascii-response)) (if (and string ...) (substring string 0 ...) string))
  (let ((proc ...) string) (if (null proc) (error "Cannot start idn application (to-ascii)") (idna-to-ascii-response-clear) (process-send-string proc ...) (setq string ...) (if ... ... string)))
  idna-to-ascii("gmail.com")
  message-idna-to-ascii-rhs-1("From")
  message-idna-to-ascii-rhs()
  message-generate-headers(nil)
  message-setup-1(((Newsgroups . "gmane.emacs.gnus.user") (Subject . "")) nil nil)
  message-setup(((Newsgroups . "gmane.emacs.gnus.user") (Subject . "")))
  message-news("gmane.emacs.gnus.user")
  gnus-post-news(post "gmane.emacs.gnus.user")
  gnus-summary-post-news(nil)
  call-interactively(gnus-summary-post-news)