smtp-deba.hashnode.devSending Emails – How Is It Done Under the Hood?email or Electronic Mail is just like a sending letters through post office. For this article we will take a real life scenario for posting mails physically to the recipent. Real-life posting : Bob lives in Kolkata, pincode 700119, and his old friend...Dec 6, 2025·5 min read
docker-mongodb.hashnode.devRecently faced this authentication error in mongoDB connection using docker containerIn my projects i do use docker containers for the db as it is heavy to have databases in locally and it will hectic in long run so why not using docker containers. Docker containers made developers job much easier by the help of virtualization. So gr...Nov 12, 2025·2 min read
authentication-chai-aur-code.hashnode.devAPI (Application Programming Interface)API is a set of protocols or rules to build and integrate application softwares. In simple words an API is like a contract between an information provider and information user establisher.It sets the format for the information or content required fro...Jun 7, 2025·2 min read
authentication-chai-aur-code.hashnode.devTCP(Transport Control Protocol) handshakeIn networking TCP handshakes are very very important . Typically our web browser talks for use with the servers. when we type a url or a domain in the search engine then first DNS lookup is happend . What is DNS lookup? DNS lookup is the process wher...May 30, 2025·2 min read
authentication-chai-aur-code.hashnode.devAuthentication with AccessToken & RrfreshTokenAccess tokens and refresh tokens are essential components of user authentication, allowing users to log in and maintain their session. An access token contains user details such as user ID, username, and email. The refresh token, which is used to obt...Apr 18, 2025·2 min read
