diff --git a/mail-send b/mail-send
new file mode 100755
index 0000000..1edbe6b
--- /dev/null
+++ b/mail-send
@@ -0,0 +1,57 @@
+#! /bin/sh
+# usage: mail-send < FILE
+set -efu
+
+get_in_reply_to() {
+  sed -n '/^In-Reply-to:/I{s/In-Reply-to:\s*//I;h;:a;n;/^\s/{s/^\s*//;H;ba};x;p;q}' |
+  sed -n 's/^<\(.*\)>$/\1/p' |
+  grep .
+}
+
+now=$(date --rfc-email)
+id=$(whoami)+$(date +%s -d "$now")@$(hostname -f)
+
+# TODO check if mail with that ID already exists
+
+# TODO encode subject https://ncona.com/2011/06/using-utf-8-characters-on-an-e-mail-subject/
+#       and maybe recipients
+
+# TODO use tmpfile instead?
+mail=$(
+  env now="$now" id="$id" \
+  jq -Rrs '
+    # TODO dedup with mail-reply
+    split("\n") |
+    index("") as $i |
+    .[:$i] as $head |
+    .[$i:] as $body |
+
+    # TODO each of these could be followed by multiple lines starting with spaces
+    ($head | map(select(test("^(Date|Message-ID|User-Agent):";"i") | not))) as $head |
+
+    ($head + [
+      "Date: \(env.now)",
+      "Message-ID: <\(env.id)>",
+      "User-Agent: much"
+    ]) as $head |
+
+    ($head + $body) | join("\n")
+  '
+)
+
+printf %s "$mail" | msmtpq --read-recipients --read-envelope-from
+
+# insertion is done upstream (by gmail, posteo, and the like)
+# printf %s "$mail" | notmuch insert
+
+if in_reply_to=$(printf %s "$mail" | get_in_reply_to); then
+  if test "$(notmuch search --output=messages "id:$in_reply_to")" != "id:$in_reply_to"; then
+    echo "while trying to put replied tag, failed to find exactly one message" >&2
+    echo "  query = id:$in_reply_to" >&2
+    exit 1
+  fi
+
+  notmuch tag +replied -unread -- "id:$in_reply_to"
+fi
+
+echo "id:$id"
diff --git a/packages/vimPlugins/vim-mail.nix b/packages/vimPlugins/vim-mail.nix
new file mode 100644
index 0000000..206737e
--- /dev/null
+++ b/packages/vimPlugins/vim-mail.nix
@@ -0,0 +1,10 @@
+{ vimUtils, fetchFromGitHub }:
+vimUtils.buildVimPluginFrom2Nix {
+  name = "vim-mail";
+  src = fetchFromGitHub {
+    owner = "dbeniamine";
+    repo = "vim-mail";
+    rev = "acdbb5bdd2bc6fe5dc46e3dc7ba5e1dcb81630c2";
+    sha256 = "1q4ly3spnh8hx6q8yihbi6rcjd1hd2r5fllm5lwnq9dmlj6l1l10";
+  };
+}