How accurate is MailGuard?+
We average 99.2% accuracy across our customer base, measured against post-send bounce data. Catch-all and unknown statuses are reported transparently so you can decide how to handle them.
What checks do you run on each email?+
Syntax (RFC 5322), MX record lookup, SMTP probe, role address detection (info@, support@…), disposable provider detection, free-provider classification, catch-all detection, blacklist screening, and mailbox-full inference.
Will verification damage my sender reputation?+
No. We use passive SMTP techniques that do not generate bounces or visible traffic in your domain's reputation metrics.
Do credits expire?+
Never. Buy once and use whenever — even years later.
How is pricing structured?+
Pay-as-you-go credits, starting from $0.0008 per email at higher volumes. No subscriptions, no per-seat fees. See the pricing page for tiers.
Do you offer refunds?+
Unused credits are refundable within 30 days of purchase. Used credits are non-refundable.
What file formats does bulk verification accept?+
CSV and TXT. We auto-detect the column containing email addresses. Headers are optional.
Is there a file size limit?+
Single uploads can contain up to 1,000,000 rows. For larger jobs, contact support — we can stage uploads in batches.
How is my data handled?+
We are GDPR-compliant. Your uploaded lists are processed in-memory and stored encrypted at rest only as long as needed to deliver results. We never sell, share, or aggregate your data.
Where are your servers located?+
Verification runs on edge infrastructure in 12 regions globally. Customer data is stored in our primary EU region with optional US residency on request.
Do you have an API?+
Yes. The REST API responds in under 2 seconds and is intended for real-time signup verification. Documentation is on the docs page.
What happens with catch-all addresses?+
Catch-all servers accept any address, so a definitive verdict is impossible. We flag them as 'risky' so you can choose to include, exclude, or send a confirmation email.
Can I integrate with my CRM or ESP?+
Yes — via the API. Native integrations for Mailchimp, HubSpot, and Klaviyo are on the roadmap.
Do you support team accounts?+
Single-user accounts today. Multi-seat workspaces are in private beta — contact support to join.
How long does bulk verification take?+
Roughly 1,000 emails per minute. A 100K list typically completes within 90–120 minutes.