M.S. Software Engineering

E-mail has been considered as one of the most primary communication channels among the users with the rapid extension of internet. Unfortunately e-mail is also one of those tools, if not used properly could bring in irreparable consequences. But, recently the increasing popularity and fewer cost of sending an email makes it very easy to send unsolicited messages blindly to thousands of people at no cost at all by using easily available bulk mailing software and large lists of e-mail addresses typically harvested, even purchased or rented from web pages and news group archives. The Anti-Spam SMTP Proxy (ASSP) mail server engine is preferred one of the best from all the existing Mail filters as it is a platform independent open source-filtering engine and its file size is 565.5KB, which much less compared to other mail filters.

Spam messages are nuisance and huge problem to most users since they clutter their mailboxes and waste their time to delete all the
junk mails before reading the legitimate ones. They also cost user money with dial up connections, waste network bandwidth and disk space and
most importantly make available harmful and offensive materials such as pornographic sites to children. All these problems can be rectified by
using an apt Mail filter. The Mail filter that we have considered here is open source engine widely known as Anti Spam SMTP Proxy.
This paper provides a framework to overcome the limitations of the existing ASSP server engine by restructuring the existing ASSP server
engine. This paper would deal with spam detection as image spam, video spam that come as attachments and a single line message that would
direct to another URL with a trainable fuzzy classifier to build an automatic anti spam filter. Based on the rule, evaluations were done to predict
whether the given mail is a valid or invalid and the report is updated in the database. Finally, our work attempts to improve performance of the
Anti Spam SMTP Proxy Mailfilter by configuring the ASSP server engine with an efficient Mail Transfer Agent based on the analysis done with
leading open source MTAs like Sendmail, Postfix and Qmail.

An independent, self-governing group of mobile wireless hosts communicate through wireless
links by forming a temporary network (Mobile Ad-hoc Network) in a dynamic manner without any fixed
and centralized infrastructure. Since the nodes in MANET are not stationary, same path may not be
taken always for routing between the sender and the receiver(s). So, routing in such situation is a
complicated task. In addition, the resources of the wireless nodes are limited. With the intention of saving
the resources of the nodes in the network, multicasting can be used instead of multiple unicast data
transmissions whenever a node needs to send same data in parallel to several destinations. The grouporiented
services are the primary ones that support today’s need and trend of communication. In recent
years, such services are provided with the help of MANETs. The residual energy of the battery of a
mobile node is finite (before recharging is done), which is a constraint while developing multicast routing
protocols. Genetic Algorithm (GA) presents an improved solution for the multi-constrained multicast
routing problem. By choosing proper fitness function and values for metrics such as initial population
size, crossover and mutation that closely relates to the chosen scenario, the genetic algorithm optimizes
the routes in terms of selected metrics. This paper focuses to provide a survey and analyses the categories
of multicast routing protocols. In addition, this also covers the details of the application of genetic
approach in finding multicast routes.

In general, Wireless communication is defined as sharing of information between one or more systems through wireless links. Wireless networks can be categorized into two different modes as infrastructure based and infrastructure less. Infrastructure based mode is the most common use wireless mode for the end user loop. Infrastructure fewer modes also called as the Ad hoc mode relies on wireless communications without any fixed infrastructure. Infrastructure based networks are characterized by their use of access points (AP), or base stations. The most known example of infrastructure based wireless network is GSM and more recently, Wi-Fi. Ad Hoc networks introduce a new way of communication. An ad hoc network is a collection of wireless mobile nodes that dynamically functions as a network without the use of any existing infrastructure and centralized administration. Mobile Ad-hoc networking (MANET), an emerging field of wireless networking is an autonomous system of wireless mobile hosts, connected by wireless links that dynamically create a temporary network and establish an infrastructure less network. The topology of the network may change frequently and unpredictably. Multicast routing has been widely applied in mobile ad hoc networks (MANETs), to support different group oriented applications like video conferencing, interactions with Special interest groups etc., efficiently. This paper presents the comparative analysis of two multicast routing protocols, PUMA and ODMRP.