Cleaning an email list is maintenance, not a cure

Описание и применение

Проверка адресов в реальном времени снижает bounce‑rate до 2‑5 % и устраняет необходимость поддерживать очищенный CSV‑файл.

Задача

Email lists degrade over time; traditional cleaning removes only a subset of dead rows and cannot prevent future decay, leading to high bounce rates.

Результат

On‑demand verification eliminates stale data, reduces bounce rates to 2‑5%, and removes the need to maintain cleaned CSV files.

Рабочий процесс

• Upload CSV to TAPAC API or use local tool
• API performs SMTP probe for each address and returns verification state with timestamp
• Filter out hard bounces, syntax errors, duplicates, and role accounts
• Mark catch‑all domains as unknown
• Use verified addresses directly in campaigns
• Schedule periodic on‑demand verification for new contacts or before sending
• Avoid maintaining a static cleaned file
• Pay per verified contact after free quota

Доказательства

Only the first row is a moving target, and it is the one that dominates the file.

Источник

A verifier can run that probe a hundred times and learn nothing new, because the reply describes the server's policy rather than the mailbox.

Источник