Кодировка автоответчика (Autoreply)

vim /etc/exim/exim.conf

В секции

begin transports
# ...
# ...
# ...
userautoreply:
  driver = autoreply
  file = /etc/exim/domains/$domain/autoreply.${local_part}.msg
  from = "${local_part}@${domain}"
  subject = "${if def:h_Subject: {Autoreply: ${quote:${escape:$h_Subject:}}} {Autoreply Message}}"
  to = "${sender_address}"

Для нормальной кодировки письма добавляем строку

headers = Content-Type: text/plain; charset=utf-8;\nContent-Transfer-Encoding: 8bit

Для нормальной кодировки темы письма заменяем строку subject

subject = "${if def:h_Subject: {Autoreply: \"${rfc2047:$h_Subject:}\"} {Autoreply Message}}"