Keep your Zoho Campaigns contacts clean, deliverable, and off your active count
Zoho Campaigns automatically retires an address that hard-bounces — it moves the contact to Bounced Contacts, suppresses it, and drops it off your active-contact count — but it can't judge an address it has never sent to. Those never-mailed invalids from imports and signup forms sit as active, billable contacts and quietly erode your deliverability until your first campaign proves them dead. Qualisend closes that gap: export your contacts, verify every address, and move the dead ones to Do-Not-Mail before you send. Here's the workflow that works today, plus the API and no-code options.
One-click Zoho Campaigns sync is paused while we rebuild the platform
We've deliberately paused our one-click native connectors while we re-engineer the sync layer they run on — hardening how we authenticate, respect each platform's rate limits, and write results back — so that when the native Zoho Campaigns integration returns, it stays dependable at any list size rather than fragile at scale. None of this touches how Qualisend verifies an address.
Everything you need works today: the CSV export → verify → reimport loop below, and the API for verifying at signup, are both fully supported and running in production — that's how teams keep Zoho Campaigns clean right now.
What Zoho Campaigns cleans for you
Zoho Campaigns' native hygiene runs on contact status and its Do-Not-Mail suppression list. A hard bounce is treated as permanent: the contact is moved to Bounced Contacts, added to the suppression list, and stops receiving every future campaign — and because it's no longer an active contact, it also drops off the count your plan is billed on. A soft bounce buys up to seven more attempts; if the address keeps failing across those sends, Zoho escalates it to a hard bounce and retires it the same way. Unsubscribes and spam complaints are moved to the Do-Not-Mail registry and can't be mailed again — Zoho even blocks a re-import from silently re-adding an unsubscribed address, keeping it on Do-Not-Mail instead. For addresses Zoho Campaigns has actually mailed, that's reliable, automatic hygiene.
What it can't catch
The catch is that every one of those mechanisms is reactive — it needs a send and a bounce (or a complaint) to fire. Never-mailed invalids from imports and signup forms, disposable addresses, role addresses like info@ and support@, and decayed mailboxes have never bounced because Zoho has never sent to them, so they sit in your account as active contacts that look perfectly healthy until your first campaign hits them — which is exactly when a mailbox provider forms its first impression of your domain. An imported list is the sharpest case: it arrives with its bounce history amputated, so an address that was already failing on the old platform looks brand new in Zoho Campaigns — and counts as an active, billable contact from the moment it lands.
Why a clean Zoho Campaigns list matters
On Zoho Campaigns the stakes are double, because it prices your plan on your number of active (marketing) contacts. Its own hygiene already helps here — a hard-bounced or unsubscribed address is retired and drops off the active count on its own, so Zoho's housekeeping never inflates your bill. The money leak is the never-mailed junk: an imported invalid has never bounced, so Zoho still counts it as an active, billable contact — and it keeps costing you, campaign after campaign, until one of them finally bounces it. Verifying a file before you import keeps those addresses off your active count from day one. The bigger payoff is deliverability: every dead mailbox or spam trap you hit becomes a bounce or complaint that mailbox providers read as a signal about your sender reputation — the exact signal Gmail and Yahoo's 2024 sender rules now police on bounce and complaint rates. Cleaning before a send does both jobs at once: it trims the active count your plan is billed on and protects the inbox placement of the campaigns that actually convert.
The workflow that works today
Direct connectors are paused while we rebuild the platform, so the dependable path is the CSV loop: export from Zoho Campaigns, verify in Qualisend, reimport the clean file.
Export your contacts from Zoho Campaigns
In the Contacts module, open All Contacts — or open a specific mailing list under List Management for a targeted maintenance clean — then choose Export Contacts (or Export Mailing List) from the More menu. Select the Active contact type, keep the email field, and download the file as CSV.
Verify the file in Qualisend
Upload the CSV to Qualisend bulk cleaning — up to 1,000,000 addresses per job, duplicates charged once — or paste addresses directly. The free plan's 100 one-time credits, which never expire, cover a first sample before you commit.
Read the results
Every address returns deliverable, risky, undeliverable, or unknown with a reason code, a 0–100 score, and sub-flags (catch-all, disposable, role, full mailbox), plus the MX provider and probe detail as evidence. Download the cleaned CSV.
Move the undeliverables to Do-Not-Mail in Zoho Campaigns
Filter your results to undeliverable, then move those addresses to Zoho's Do-Not-Mail (suppression) list by bulk-importing the file: on the Contacts tab, choose Import contacts → Import to "Do not mail." That drops them off your active (billable) count and puts them on the list Zoho checks before every send, so they can't be mailed again — and, unlike deleting the contacts outright (select them in All Contacts, then More Actions → Delete), it keeps the suppression record that stops a future import from silently re-adding them.
Or automate it at signup
Prefer to keep junk out from the start? Verify at the point of capture with the Qualisend REST API (scoped keys, rate limits, webhooks), or wire a no-code flow through Zapier, Make, or n8n so a new Zoho Campaigns contact is checked before it's ever added — so typos and disposable addresses never reach a send or your active-contact count.
What Qualisend flags on every address
- Never-mailed invalid addresses that would hard-bounce on your next campaign and land in Bounced Contacts
- Disposable / throwaway domains built to expire
- Role addresses (info@, support@) that skew engagement metrics and attract complaints
- Catch-all domains, flagged so you can move them to a dedicated list and throttle
- A 0–100 confidence score and machine-readable reason code for every address
A native, one-click Zoho Campaigns connector is part of the platform we're rebuilding — it's returning, not deprecated. Until it ships, the CSV loop above and the API are the fully supported path, and they work with any Zoho Campaigns plan.
What to do with each result
Every address comes back with a verdict and sub-flags. Here's the action that keeps your Zoho Campaigns list clean without throwing away contacts you can still reach.
deliverableKeep as an active contact and send as normal.deliverable + role flagKeep for transactional and account mail; exclude from engagement-judged automations.risky + catch-all flagMove to a dedicated list and throttle — the domain accepts everything at the door, so the mailbox behind it can't be confirmed.risky + disposable flagMove to Do-Not-Mail — the inbox was built to expire.unknownKeep active and re-verify next clean — usually greylisting or rate-limiting, not a verdict on the mailbox.undeliverableMove to Do-Not-Mail to suppress it and drop it off your active count; don't wait for the bounce to prove it.Related reading
Verify at signup so junk never becomes an active contact.
Paste a sample of your Zoho Campaigns list and see the shape of it before you commit credits.
How fast a dirty list compounds into a deliverability problem.
Why a clean list protects inbox placement on your sending domain.
The 2024 bounce and complaint thresholds your Zoho Campaigns sends are judged on.
The general step-by-step behind the Zoho-specific loop above.
Zoho Campaigns verification FAQ
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