ZapBounce and Nutshell
Nutshell runs sales CRM and email marketing from the same contact base. A dirty list therefore damages two things at once: the marketing sending reputation and the sales sequences that share it.
One verification pass covers both, provided the verdict is stored somewhere both sides can read.
Sales sequences and marketing campaigns share one list
In a separated stack, a bad marketing list does not touch sales email. Here they draw from the same people, so an unverified import reaches both.
Nutshell's marketing sends have their own deliverability constraints, and the bounces from a shared contact base count against them.
The practical answer is a single verdict field that both the sequence audience and the campaign audience filter on.
How the data moves
Verify the contact base in one pass
Both sides read the same people, so one export covers both uses.
Store the verdict as a custom field
Nutshell custom fields are filterable, which is what lets both the sequence audience and the campaign audience read the same value.
Filter both audiences on the field
A sequence and a campaign built from the same filter cannot drift apart, which is the failure a shared contact base invites.
Re-verify before any large campaign
Marketing sends reach further into the contact base than sales sequences do, so they surface the stale part first.
Setting it up
- Create a custom field for the verdict and one for the check date.
- Export the contact base as CSV with custom fields included.
- Verify the file and import the verdicts back, matching on email.
- Build one saved filter on the verdict and use it for both sequences and campaigns.
- Exclude invalid addresses from both audiences rather than deleting the contacts.
- Re-run the pass before each large marketing campaign.
Nutshell: common questions
Do I need to verify twice for sales and marketing?
No. One pass, one verdict field, both audiences filter on it.
Which audience reaches further into the list?
Marketing, usually by a long way. That is why it finds the stale addresses first.
Should invalid contacts be deleted?
No. Filter them out of both audiences and keep the record and its deal history.
A trade-show import that reached both teams in a week
Say you import 1,200 badge scans from a trade show into Nutshell on Monday. On Tuesday a rep enrolls the 300 best-fit contacts in a five-step sales sequence. On Thursday marketing sends the post-show newsletter to all 1,200. Badge data is typed by hand at a registration desk, so suppose 7% of it is wrong: 84 bad addresses.
About 21 of those sit in the rep's sequence, and the first step bounces from the rep's own connected mailbox. All 84 bounce in Thursday's campaign. The same 21 addresses have now failed twice in three days, from two sending identities that belong to one company.
Verify the file before the import and bring the result in as one of the import columns, mapped to your custom field. Both teams then start without the 84 known-bad rows, and neither has to clean up after the other.
One field, two different rules
Sharing a verdict field doesn't mean both audiences should apply the same filter.
For the marketing audience a strict filter makes sense: valid only, plus catch-all as a separate send you watch closely. A campaign goes to everyone at once, so a bad segment shows up as one large bounce spike.
Sales sequences can afford to be looser. A rep emailing 30 people a day can include catch-all and unknown contacts, because the volume is low and a reply is what they're after anyway. Plenty of good B2B prospects sit on catch-all domains, and cutting them from a sequence costs more pipeline than it saves in bounces. Invalid stays out of both.
Store the check date next to the verdict and let each filter use it. Marketing might require a check within 90 days before a large send, while a sequence accepts anything checked in the last six months. When a rep edits a contact's email address, clear both fields, since the old verdict describes an address that's no longer on the record.
Check a Nutshell export today
100 free checks a month, no card. Unknown results and duplicates are never billed.