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Learning to Filter Spam E-Mail: A Comparison of a Naive Bayesian and a Memory-Based Approach

Computation and Language · Submitted 18 Sep 2000

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Both methods achieve very accurate spam filtering, outperforming clearly the keyword-based filter of a widely used e-mail reader.

how it is stated · asserted 1.00 read the record →

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arXiv IDcs/0009009 (version 1)
Pith ID3RNH4I72, Pith's permanent record of this paper and its review
CitationConstantine D. Spyropoulos, Georgios Paliouras, Georgios Sakkis, Ion Androutsopoulos, Panagiotis Stamatopoulos, Vangelis Karkaletsis. "Learning to Filter Spam E-Mail: A Comparison of a Naive Bayesian and a Memory-Based Approach." arXiv:cs/0009009 (2000). https://pith.science/paper/3RNH4I72
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,452 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.09 · human participants 0.03 · controlled comparison 0.88 · randomized assignment 0.01 · states quantitative result 0.06 · compares with prior results 0.97 · mentions code or data availability 0.08.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

We investigate the performance of two machine learning algorithms in the context of anti-spam filtering. The increasing volume of unsolicited bulk e-mail (spam) has generated a need for reliable anti-spam filters. Filters of this type have so far been based mostly on keyword patterns that are constructed by hand and perform poorly. The Naive Bayesian classifier has recently been suggested as an effective method to construct automatically anti-spam filters with superior performance. We investigate thoroughly the performance of the Naive Bayesian filter on a publicly available corpus, contributing towards standard benchmarks. At the same time, we compare the performance of the Naive Bayesian filter to an alternative memory-based learning approach, after introducing suitable cost-sensitive evaluation measures. Both methods achieve very accurate spam filtering, outperforming clearly the keyword-based filter of a widely used e-mail reader.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 We investigate the performance of two machine learning algorithms in the context of anti-spam filtering. contribution 1.00 0.91 0.04 asserted 0.64
s1 The increasing volume of unsolicited bulk e-mail (spam) has generated a need for reliable anti-spam filters. background 1.00 0.04 0.02 asserted 1.00
s2 Filters of this type have so far been based mostly on keyword patterns that are constructed by hand and perform poorly. background 0.91 0.06 0.02 asserted 1.00
s3 The Naive Bayesian classifier has recently been suggested as an effective method to construct automatically anti-spam filters with superior performance. background 1.00 0.05 0.06 hedged possibility 0.63
s4 We investigate thoroughly the performance of the Naive Bayesian filter on a publicly available corpus, contributing towards standard benchmarks. contribution 0.97 0.94 0.05 asserted 0.91
s5 At the same time, we compare the performance of the Naive Bayesian filter to an alternative memory-based learning approach, after introducing suitable cost-sensitive evaluation measures. contribution 0.73 0.93 0.07 asserted 0.72
s6 Both methods achieve very accurate spam filtering, outperforming clearly the keyword-based filter of a widely used e-mail reader. result 1.00 0.90 0.81 asserted 1.00

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.76.

What was examined, and what was not

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  • arXiv listing abstract v1
not examined
  • full text
  • figures and tables
  • references and citing sentences
  • relations to other papers
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  • P abstract
not run
  • S sections
  • T body sentences
  • C citations
  • R cross-paper relations

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

We investigate the performance of two machine learning algorithms in the context of anti-spam filtering. The increasing volume of unsolicited bulk e-mail (spam) has generated a need for reliable anti-spam filters. Filters of this type have so far been based mostly on keyword patterns that are constructed by hand and perform poorly. The Naive Bayesian classifier has recently been suggested as an effective method to construct automatically anti-spam filters with superior performance. We investigate thoroughly the performance of the Naive Bayesian filter on a publicly available corpus, contributing towards standard benchmarks. At the same time, we compare the performance of the Naive Bayesian filter to an alternative memory-based learning approach, after introducing suitable cost-sensitive evaluation measures. Both methods achieve very accurate spam filtering, outperforming clearly the keyword-based filter of a widely used e-mail reader.

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