Email is an efficient and widely used communication method between professionals. However, unsolicited bulk emails, known as spam, clutter inboxes and cause lost productivity. This project builds a classifier to identify and filter spam emails.

Spam email filtering is a common machine learning task. Classification is challenging due to the high dimension feature space of text data and large volume of documents. This project implements a robust voting ensemble classifier and topic modeling to categorize emails.

Key features:

• Data preprocessing including tokenization, stopword removal
• Hyperparameter tuning using RandomizedSearchCV
• VotingClassifier ensemble of Naive Bayes, SVM, Neural Net models
• Latent Dirichlet Allocation (LDA) topic modeling to categorize non-spam
• Evaluation metrics such as confusion matrix and classification report

The implementation is an easy to run Jupyter notebook:

1. Download notebook and encoded email dataset
2. Ensure key libraries (NumPy, SciKit-Learn) are installed
3. Run notebook cells end-to-end to preprocess, train, and evaluate model

The current model achieves 97% accuracy on the test set. This could likely be improved further by tuning model hyperparameters and the number of topics for LDA.

This project was made with Niharika Bhende, Riddhi Dumre and Vishesh Giyanani