MZnet : mail service for personal micro-computer systems

Traditional computer mail systems involve a co-resident User Agent (UA) and Mail Transfer System (MTS) on a time-shared host computer which may be connected to other hosts ina network, with new mail posted or delivered directly through co-resident mail-slot programs. To introduce personal micro-computers (PCs) into this environment requires modification of the traditional mail system architecture. To this end, the MZnet project uses a split-slot model, placing UA programs on the PCs while leaving MTA programs on a mail relay host which can provide authentication and buffering. The split-slot arrangement might be viewed as a new protocol level which operates somewhere between the currently defined MTS-MTS and UA-UA levels

Online Searching with Internet

Librarians use Internet for its E-mail function and for remote access to online catalogs, electronic publications, databases and commercial online systems. The file transfer protocol allows transfer of information from another site

Rejecting spam during SMTP sessions

This paper analyzes a spam rejection scheme at Simple Mail Transfer Protocol (SMTP) sessions. This scheme utilizes a layer-3 e-mail pre-classification technique to estimate e-mail classes before an SMTP session ends. We study the spam rejection scheme using discrete-time Markov chain analysis and analyze the performance of the proposed scheme under different e-mail traffic loads and service capacities. The proposed scheme reduces the e-mail volume to be queued and processed by e-mail servers. This reduces non-spam e-mail queuing delay and loss, and protects e-mail servers from being overloaded by spam traffic

Typechecking protocols with Mungo and StMungo: a session type toolchain for Java

Static typechecking is an important feature of many standard programming languages. However, static typing focuses on data rather than communication, and therefore does not help programmers correctly implement communication protocols in distributed systems. The theory of session types provides a basis for tackling this problem; we use it to develop two tools that support static typechecking of communication protocols in Java. The first tool, Mungo, extends Java with typestate definitions, which allow classes to be associated with state machines defining permitted sequences of method calls: for example, communication methods. The second tool, StMungo, takes a session type describing a communication protocol, and generates a typestate specification of the permitted sequences of messages in the protocol. Protocol implementations can be validated by Mungo against their typestate definitions and then compiled with a standard Java compiler. The result is a toolchain for static typechecking of communication protocols in Java. We formalise and prove soundness of the typestate inference system used by Mungo, and show that our toolchain can be used to typecheck a client for the standard Simple Mail Transfer Protocol (SMTP)

Implementation of secure email server in cloud environment

In the recent virtual communication world, the email services play a vital role as a basic content of heterogeneous networking infrastructure. Whereby, multiple platforms are connecting each other. Mail Server refers to computer performing Mail Transfer Agent functions. MTA is software that delivers electronic mail messages from one computer to another, by using client-server application architecture. MTA implements both sender and receiver portions of SMTP (Simple Mail Transfer Protocol). Postfix is a free and open-source MTA which is fast, easy-to-administrator and provide secure communication over Internet. In this paper we focus on the problem of email contents disclosure, and establish a secure mail server by using Postfix in Linux platform and then implement it into a cloud service provider as IaaS (Infrastructure as a Service). Security is provided by tuning a Transport Layer Security (TLS), and SMTP-AUTH which use Simple Authentication and Security Layer (SASL) as a security mechanism and platform

A Practical Study of E-mail Communication through SMTP

Simple Mail Transfer Protocol (SMTP) is an application layer protocol for e-mail communication. It has been adopted as a standard by Internet Engineering Task Force (IETF). SMTP has set conversational and grammatical rules for exchanging messages between connected computers. It has evolved through several revisions and extensions since its formation by Jon Postel in 1981. In SMTP, the sender establishes a full-duplex transmission channel with a receiver. The receiver may be either the ultimate destination or an intermediate forwarding agent. SMTP commands are issued by the sender and are sent to the receiver, which responds to these commands through codes. Each SMTP session between the sender and the receiver consists of three phases namely: connection establishment, mail transactions and connection termination. This paper describes and illustrates the process of e-mail communication through SMTP by issuing the individual SMTP commands directly to transmit e-mail messages. It also describes individual SMTP commands and extensions with practical implementation using a Telnet client

Rancang Bangun Monitoring Jaringan Dengan Metode Simple Mail Transfer Protocol

Salah satu permasalahan jaringan yang ada ketika ada gangguan perangkat jaringan, perangkat jaringan yang terputus koneksi menemukan status perangkat yang terputus memerlukan waktu. Jadi ada rentang waktu yang dibutuhkan dalam melihat status koneksi perangkat yang bermasalah tersebut. Metode penelitian yaitu incremental model yang dilakukan adalah requirement analisis penentuan kebutuhan, specification proses spesifikasi dari analisis kebutuhan, architecture design perancangan aplikasi agar sesuai kebutuhan, code melakukan design dengan menuliskan kode program, test pengujian aplikasi yang dibuat. Aplikasi ini menerapkan fungsi tool Packet Internet Gropher (Ping) untuk untuk memeriksa aktifitas jaringan berbasis teknologi Transmission Control Protocol/Internet Protocol (TCP/IP). Aplikasi ini juga terintegrasi ke database MySQL. Kesimpulan dari penelitian ini aplikasi yang dibuat dengan Bahasa pemrograman php dapat memantau koneksi setiap perangkat jaringan dan mengirimkan log ke email admin yang menerapkan protokol Simple Mail Transfer Protocol dan memberikan kemudahkan pencarian posisi perangkat yang mengalami gangguan untuk ditindak lanjut perbaikan

RANCANG BANGUN SISTEM KAMERA PEREKAM PORTABLE MENGGUNAKAN RASPBERRY PI TERINTEGRASI DENGAN SERVER BERBASIS INTERNET OF THINGS

Camera recorders in general will continue to record continuously without stopping and this will take up storage space. This is deemed less effective because of its limited capacity and also in terms of security, the recorded information is very vulnerable. Therefore, in this study, a portable recording camera system was designed using multi sensors and integrated raspberrypi with the server and then the recording results will automatically be sent to the server and forwarded to the user's email. This portable recording system uses a PIR sensor (Passive Infrared Receiver) HC-SR501, Raspberry Pi 3 B plus, Infrared led light, Pi camera, KY-037 sound sensor, SMTP Server (Simple Mail Transfer Protocol). When the PIR sensor detects movement or the KY-037 sound sensor detects sound, it will be processed by the Raspberry Pi and then the Pi camera will automatically perform the recording process periodically. When finished, the recording results will be sent directly to the user's email via the SMPT (Simple Mail Transfer Protocol) server provided by Google. All processes in this tool system work completely automatically

Internet vecí

V súcasnosti architektúra založená na Internete dovoluje výmenu služieb a tovarov medzi prvkami, zariadeniami a objektami pripojenými do siete. IoT sa odvoláva na sietové pripojenie každodenných objektov, ktoré sú casto vybavené urcitým druhom inteligencie. V tomto kontexte môže byt Internet taktiež platforma pre zariadenia na elektronickú komunikáciu, zdielanie informácií a špecifických dát so svetom okolo nich. Takže IoT môže byt vnímaný ako reálna evolúcia toho, co rozumieme pod slovom Internet. Internet bol z väcšej casti využívaný na spojovo orientované aplikacné protokoly ako HTTP (Hypertext Transfer Protocol) a SMTP (Simple Mail Transfer Protocol). Napriek tomu v dnešnej dobe velké množstvo inteligentných zariadení komunikuje medzi sebou a dalšími riadiacimi systémami. Tento koncept je známy ako M2M (Machine-to-Machine communications).Peer ReviewedPostprint (published version

Implementasi Metode Store-Forward Dengan Protokol SMTP Untuk Pengiriman Fax Pada Jaringan IP Sebagai Alternatif Migrasi Layanan Facsimile Pada Next Generation Network

Fax merupakan salah satu media telekomunikasi yang banyak digunakan di dunia perkantoran saat ini. Layanan ini merupakan salah satu fitur dari jaringan Public Switched Telephony Newtwork (PSTN). Dalam beberapa tahun kedepan jaringan PSTN akan mulai ditinggalkan dan beralih menjadi jaringan Internet Protocol (IP), paradigma ini yang kemudian dikenal dengan istilah Next Generation Network (NGN). Di Jaringan NGN semua proses transmisi data akan berbasis paket dengan transport IP. Konsekuensi dari perubahan paradigma ini salah satunya adalah berubahnya terminal fax yang lama menjadi terminal fax baru yang harus kompatibel dengan jaringan transmisi yang digunakan. Pada makalah ini dijelaskan implementasi fax metode store-forward sebagai salah satu alternatif yang bisa digunakan untuk pengiriman facsimile pada jaringan IP. Dimana terminal fax yang dipakai adalah jenis terminal fax yang lama dengan protokol standard T.30. Dengan membangun sebuah fax gateway untuk menampung data fax yang akan dikirimkan. Fax gateway bertindak sebagai Mail User Agen bagi mail server pada proses pengiriman data fax melalui jaringan IP, dimana komunikasi antara Fax Gateway dengan Mail server menggunakan protokol Simple Mail Transfer Protocol (SMTP). Hasil implementasi ini dapat membuktikan bahwa mekanisme ini dapat dijadikan acuan untuk alternatif dalam proses migrasi dari jaringan telepon PSTN menuju NGN. Kata Kunci -Fax over IP, Store-Forward, T.3