List Hygiene
List hygiene is the routine process of cleaning your contact database by removing or correcting invalid, bounced, duplicate, and unengaged email addresses.
In depth
Practically, list hygiene combines automated validation (syntax checks, MX lookups, spam-trap and role-account detection) with engagement-based pruning, where contacts that have not opened or clicked in a defined window are sunset or moved to a re-engagement track. Mailbox providers like Gmail and Outlook watch hard-bounce rates, spam complaints, and engagement signals to decide whether your mail lands in the inbox or the spam folder, so a clean list directly raises your sender reputation and inbox placement.
The most common pitfall is treating hygiene as a one-time cleanup before a big send rather than a continuous discipline, which lets bounces and dead addresses creep back in. In a quiz-funnel workflow, this matters at the point of capture: validating the email a lead submits on a Pivix scorecard before it ever enters your CRM keeps junk out at the source, so your nurture sequences reach real prospects and your scoring is based on genuine, deliverable contacts.
Example in practice
Frequently asked questions
How often should I run list hygiene?
For most B2B senders, a full hygiene pass every quarter plus continuous validation at the point of capture works well. High-volume senders or teams with rising bounce rates should review monthly to stay ahead of deliverability problems.
Does removing contacts hurt my reach?
It reduces raw list size but improves the metrics that actually matter, like open and click rates and inbox placement. Sending to engaged, valid addresses reaches more real prospects than blasting a bloated list that triggers spam filters.
What is the difference between hard and soft bounces?
A hard bounce is a permanent failure, such as a non-existent address, and should be removed immediately. A soft bounce is temporary, like a full inbox, and can be retried, but repeated soft bounces should also be suppressed.