Everything our customers ask before, during and after switching to SparrowiMailer. Can't find your answer? Talk to a human →
One credit = one successful email send. Credits never expire — buy a 10,000 pack today, use it across three months, no penalty. Bulk packs come with up to 28% discount versus our pay-as-you-go rate.
Validator credits are separate. 1 validator credit = 1 email address verified (catch-all, syntax, MX, SMTP ping).
Yes — every new account gets 200 free sending credits and 100 free validator credits. No card required to start, no time limit on the free credits.
Absolutely. For volumes above 500K sends/month or dedicated IP requirements, write to info@sparrowimailer.com. Typical enterprise plans include dedicated IPs, custom warmup pools, priority SLA and a named deliverability engineer.
Three culprits usually: cold/dirty list, missing SPF/DKIM/DMARC, and shared IPs with bad neighbors. SparrowiMailer fixes each one — we validate every address before send, force you to authenticate before warming up, and route through warm pools matched to your industry.
Yes — dedicated IPs are available on Growth, Scale and Enterprise tiers. We handle warmup (4–6 weeks ramp), reverse DNS, feedback loops with major mailbox providers, and Postmaster Tools onboarding.
On a clean, authenticated list with neutral content, our customers see 92–97% inbox placement across Gmail, Outlook and Yahoo. Numbers drop with promo-heavy copy, image-only mail, or unverified lists — the dashboard tells you exactly which lever to pull.
We benchmark at 99.1% accuracy against a 2M-row labeled dataset. Each check runs syntax → MX → SMTP handshake → catch-all detection → role-account flag → disposable-domain check. Results return in 1.4s median.
Yes. CSV up to 5M rows, drag-and-drop in the Validator tab. Results stream live; you can pause/resume and download a cleaned CSV with risk-tagged rows.
They're flagged as risky, not valid. You decide whether to include them. We recommend skipping catch-alls for cold outreach but including them for transactional sends.
The desktop app runs locally on Windows. It lets you connect your own SMTP accounts (Google Workspace, Microsoft 365, Zoho, custom) and rotate between them automatically with random delays — perfect for cold outreach that needs to look human.
It uses your own SMTP quota, so no sending credits are consumed. You only pay for validator credits if you use the built-in cleaner. The app itself is included with any active plan.
Yes. Every paid order auto-generates a GST-compliant PDF invoice with your billing details, GSTIN (if added), HSN code, and CGST/SGST or IGST split. Download from Dashboard → Billing.
Unused credits are refundable within 7 days of purchase, no questions asked. Used credits and consumed validator runs are non-refundable. Refunds hit your original payment method within 5–7 business days.
Razorpay processes UPI, all major credit/debit cards (Visa, MasterCard, Amex, RuPay), net banking (50+ Indian banks), and wallets (PayTM, PhonePe, Amazon Pay). International cards work through 3D Secure.
Primary infrastructure runs on AWS Mumbai (ap-south-1) with hot standby in Singapore. All data encrypted at rest (AES-256) and in transit (TLS 1.3). SOC 2 Type II audit completed; ISO 27001 in progress.
No human reads outgoing content. Automated systems check for spam-trigger words and large attachments to protect deliverability, but no content is logged beyond 30 days. Read our privacy policy for the long form.
The fastest way to get unblocked is to talk to a human. We answer in under 4 hours on business days.