Bulk Email List Cleaning: Remove Invalid Emails Before Sending Campaigns

async function cleanEmailList(csvFilePath) {
  const emails = parseCsv(csvFilePath)
    .map(row => row.email)
    .filter(Boolean);

  const batchSize = 100;
  const results = {
    deliverable: [],
    corrected: [],
    undeliverable: [],
    disposable: [],
    highRisk: []
  };

  for (let i = 0; i < emails.length; i += batchSize) {
    const batch = emails.slice(i, i + batchSize);

    const response = await fetch(
      'https://api.email-check.app/v1/validate/bulk',
      {
        method: 'POST',
        headers: {
          'Authorization': `Bearer ${process.env.API_KEY}`,
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({ emails: batch })
      }
    );

    const data = await response.json();

    for (const result of data.results) {
      if (result.disposable) {
        results.disposable.push(result.email);
      } else if (result.status === 'deliverable') {
        if (result.suggestion) {
          results.corrected.push({
            original: result.email,
            corrected: result.suggestion
          });
        } else {
          results.deliverable.push(result.email);
        }
      } else if (result.riskScore > 80) {
        results.highRisk.push(result.email);
      } else {
        results.undeliverable.push(result.email);
      }
    }
  }

  const cleanList = [
    ...results.deliverable,
    ...results.corrected.map(c => c.corrected)
  ];

  console.log(`Clean list: ${cleanList.length} emails`);
  return { cleanList, report: results };
}