begin authenticators

cram:
   driver = cram_md5
   public_name = CRAM-MD5
   # server_secret = ${if eq{$1}{user}{password}fail}
   server_secret = ${lookup{$1}lsearch{/etc/mail/auth}{$value}fail}
   server_set_id = $1

login:
   driver = plaintext
   public_name = LOGIN
   server_prompts = "Username:: : Password::"
   # server_condition = ${if and{ {eq{$1}{user}} {eq{$2}{password}} } {1}{0}}
   server_condition = "\
      ${if and {{!eq{$1}{}}{!eq{$2}{}} \
      {eq{$2}{${extract{1}{:} \
      {${lookup{$1}lsearch{/etc/mail/auth}{$value}{*:*}}}}}}}{1}{0}}"
   server_set_id = $1