Q: Email Deliverability
Hi there,
I run cold email campaigns using 28 inboxes with Instantly, and I’m considering using ZeroBounce primarily for email deliverability monitoring.
I want to clarify:
If I run the Inbox & Server Test for each inbox once or twice a month (28 inboxes total), how many credits does that consume per test?
Does each inbox test cost 1 credit, or is it more?
Is this Appsumo deal sufficient for ongoing deliverability checks (SPF/DKIM, blacklist, inbox placement) across 28 inboxes, or would I need to purchase extra credits?
Anne_ZeroBounce
Jul 21, 2025A: Hello!
The ZeroBounce AppSumo listing provides 24,000 credits to validate your email address list (one credit per email address validation).
With a ZeroBounce account, you'll receive 1 Inbox Placement test every month (plus 1 Email Server Test, 1 Blacklist Monitor and 10 Email Finder queries).
Based on what you're looking for (2 Inbox Placement and Server Tests per month, and DMARC monitor for SPF/DKIM,etc.), you'll need to purchase a Starter kit ($49/mo).
Our support team is happy to assist you and provide you with a discount or free trial. Please reach out to appsumo@zerobounce.net. Thank you!
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