mail_dir=$(realpath --relative-to=. "$(dirname "$0")/../mails")
printf -v TARGET '%s/%(i%Y-%m-%d+%s)T.email' "$mail_dir" -1
+subject="$1"
+shift
to="$1"
-cc="$2"
-subject="$3"
+shift
{
- cat <<EOF
-To: $to
-Cc: $cc
-Subject: $subject
-
-EOF
+ printf 'To: %s\n' "$to"
+ printf 'Cc: %s\n' "$@"
+ printf 'Subject: %s\n\n' "$subject"
cat
} > "$TARGET"