Contact list (and list hygiene)
The contact list is the set of numbers and profiles a business can reach with its communications. List hygiene is the practice of keeping it clean and legitimate: only contacts with valid consent, removal of those who unsubscribed, data updates, deletion of inactive or wrong numbers. A well-kept list protects the number's reputation and delivery rates.
List quality determines the channel's health more than any creative tactic: sending to contacts without consent or interest produces blocks and reports, which on WhatsApp lower the number's quality rating to the point of limiting its operation. Hygiene plays out at entry, accepting only contacts with verifiable opt-in and correct data, and over time, removing those who unsubscribe, those who haven't interacted in a long while and numbers no longer active.
The operational practices: import with format checks, normalizing numbers with the international prefix and discarding duplicates; record the date and source of consent for every contact; process opt-outs immediately and permanently; segment the inactive and attempt reactivation once before archiving them. A smaller but living list delivers better, costs less and produces reliable statistics to base decisions on.
SendApp imports your lists from CSV even with imperfect formats, normalizes numbers and discards duplicates; tags, unsubscribe management and segmentation help you keep the list clean over time.
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From theory to practice
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