idkjs

Private Mailserver with Postfix, Dovecot and Fetchmail on macOS Big Sur M1

This is a simple installation and configuration manual to setup a private mailserver. The instructions will be continued in future...

Requirements

• Apple M1 with macOS Big Sur but it should working at Intel Macs 64-bit too.
• Replacement for the missing mail and imap services in the macOS Server
• Receiving and sending emails of all accounts (private and business)
• Using Postfix, Dovecot and Fetchmail

idkjs

open Typeclasses;

// a binary search tree is a binary tree that holds order-able members and
// keeps lesser values on the left and greater or equal values on the right
module Make = (Order: Ord) => {
  type t =
    | Empty
    | Node(t, Order.t, t);

  // O(log n) operation to add a new value in a valid position in the tree

idkjs

type ordering =
  | Greater
  | Less
  | Equal;

// ORD typeclass / interface module
module type ORD = {
  type t;
  let compare: (t, t) => ordering;
};

idkjs

let pure a = Some a |> Js.Promise.resolve
let fail _ = None |> Js.Promise.resolve 
let (>=>) x y a =
    x a 
    |> Js.Promise.then_ ( 
        function
        | None -> None |> Js.Promise.resolve 
        | Some s -> y s
    )

idkjs

>   Regular Expressions Cheat Sheet
>   A regular expression specifies a set of strings that matches it. This cheat sheet is based off Python 3's Regular Expressions (http://docs.python.org/3/library/re.html) but is designed for searches within Sublime Text.

>   Special Characters
    \           Escapes special characters or signals a special sequence.
    .           Matches any single character except a newline.
    ^           Matches the start of the string.
    $           Matches the end of the string.
    *           Greedily matches 0 or more repetitions of the preceding RE.
    *?          Matches 0 or more repetitions of the preceding RE.

idkjs

Dune

A first pass

A library and then an executable that uses that library.

A simple library

Create a folder called foo:

idkjs

{
  "title": "DREVO Calibur 71-key Keyboard",
  "rules": [
    {
      "description": "Set ESC to grave_accent_and_tilde",
      "manipulators": [
        {
          "type": "basic",
          "from": {
              "key_code": "escape",

idkjs

aria2c \
-x 16 \
-s 16 \
--load-cookies=cookies.txt \
https://download.developer.apple.com/Developer_Tools/Xcode_10.3/Xcode_10.3.xip

idkjs

Homebrew Permissions Denied Issues Solution

sudo chown -R $(whoami) $(brew --prefix)/*

idkjs

open Relude.Globals; // I usually do this in bsconfig

type user = {
  firstName: string,
  lastName: string,
};
type error =
  | AlreadyLoggedIn;

type context = {