Software Development

Commission

Continuous development

Spam Filter System

A real-time spam filter software for Exchange and IIS, with many black- and whitelist configuration options, and authentication filtering according to RFC standards. Includes SPF, DKIM, DMARC, and ARC checks, DNS blacklists, automatic greylisting. I took over the project in 2017. It was already functional at that time, and my task was to implement new services and innovative ideas, and to keep the technologies up to date with email standards.

Main features

Real-time mail inspection

User-friendly administration interface

Detailed and easily filterable logging

Configuration synchronization

Remote control

Detailed statistics generation

Technologies

Delphi COM

Rest API

HTML4

CSS2

Javascript

MSSQL

Appearance

Delphi

HTML

CSS

Javascript

Server

Delphi

Synapse

OpenSSL

Absolute Database

7zip

Infrastructure

Windows Server

Microsoft Exchange

Internet Information Service

Kiln

Youtrack

Teamcity

Utilities

InstallShield

TortoiseHg

WinMerge

VSCode

Outstanding innovations

Breakthrough technologies and novel approaches implemented in the project

Processing large amounts of data in real time

Intelligent configuration fine-tuning

Easily manageable detailed log file display

Real-time statistics

Challenge 1

PROBLEM

Functionality testing is too diverse and complex

SOLUTION

Development of automated and semi-automated test systems

Challenge 2

PROBLEM

The SMA type license is not effective enough to meet user needs

SOLUTION

Implementation of subscription-based licensing and simplified license management methods

Challenge 3

PROBLEM

Lack of authentication checks

SOLUTION

Implementation of SPF, DKIM, DMARC and ARC verification methods, using openssl library for signature verification in DKIM and ARC