Skip to main content

Test sending email through telnet

This the minimal telnet session to test sending to email server.
$ telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 example.com ESMTP
helo
250 example.com
mail from:me@gmail.com
250 ok
rcpt to:x9tayay@example.com
250 ok
data
354 go ahead
Subject: OTA

ota ajaj.
.
250 ok 1326364891 qp 1790
quit
221 example.com
The mail server in this case running qmail. If the email is bounced, the returned email may end up in your spam folder as the sender domain does not match, we send this from localhost instead of from gmail.com.

Comments

Popular posts from this blog

PHP with docker

A friend asking about a PHP library and I decided to test whether that library is working. But I don't have PHP environment setup (we're Python shop btw). But thanks to docker, that's easy these days. docker run -it --tty --rm --volume $PWD:/app --user $(id -u):$(id -g) composer require google/apiclient:^2.0 Then we just need to create the script to run, still in the same directory:- include_once __DIR__ . '/vendor/autoload.php'; $GCSE_API_KEY = "nqwkoigrhe893utnih_gibberish_q2ihrgu9qjnr"; $GCSE_SEARCH_ENGINE_ID = "937592689593725455:msi299dkne4de"; $client = new Google_Client(); $client->setApplicationName("My_App"); $client->setDeveloperKey($GCSE_API_KEY); $service = new Google_Service_Customsearch($client); $optParams = array("cx"=>self::GCSE_SEARCH_ENGINE_ID); $results = $service->cse->listCse("lol cats", $optParams); And we can run that script again using docker:- docker run -it --...

Ubuntu 22.04 Wayland share screen

 After switching to Dell XPS 13 which running Ubuntu 22.04, I noticed that trying to share screen through Google Meet, it shows this:-    This - Use operating system settings, I never saw it before. Usually here we will be presented the windows that we want to share.  It turned out that screen sharing in Ubuntu 22.04 indeed an issue, due to the use of Wayland instead of Xorg as its display server. Many suggested to disable wayland and back to use Xorg. I try to avoid that since Wayland seems to works fine so far. After some searching, the conclusion seems we can make this working by installing some packages. sudo apt install xdg-desktop-portal xdg-desktop-portal-gnome But it turned out that I have already installed the packages! So what were the problems?  Well, turn out it's more psychological than technical. Since the pop up is different than what I'm used to before, I never click the allow button. But clicking the allow button we will see this:-   Which...

The rise of localhost

I noticed a pattern in dex world, where you build client backend to participate in the network, and then build a web app that simply connect to  localhost:someport  for the UI. To check my scuttlebutt updates, I opened up http://localhost:8027/. For those using Ethereum Parity wallet, they can open it at http://localhost:8180/. ZeroNet users are browsing at http://localhost:43110/. But Parity for example, try to make it seamless, they still provide a dns - web3.site which then redirected to home.web3.site which simply resolved to 127.0.0.1. But this I think bring up some problem, especially non-tech user which think that Parity is a website hosted by Parity Technologies. I seen this in a some articles about the latest bug .