Welcome to Mailerio – a powerful, easy-to-use email verification-and-validation solution designed to help you keep your email lists clean, boost deliverability, and protect your sender reputation.
What Mailerio does
Mailerio verifies email addresses individually or in bulk, whether you’re running a marketing campaign, collecting leads, or integrating verification into user-signup flows (e.g., WordPress, SaaS).
Key capabilities include:
- Verifying single email addresses in real time (for example, when a user signs up).
- Bulk list verification via CSV/upload so you can clean an entire list before you send.
- API integration so you can embed email validation into your forms, CRM, or other workflows.
- Reporting & result classification (deliverable, undeliverable, risky, catch-all, etc) so you know which addresses to trust.
- Data enrichment and domain/SMTP/accept-all/disposable detection: for example, syntax validation, domain MX record check, provider details, misspelled domains, disposable email detection, role / generic addresses.
- A flexible usage model: pay‐as‐you‐go credits that don’t expire or a monthly subscription.
Why validation matters
- High bounce rates damage your sender reputation and increase the risk that your emails land in spam or get blocked. Mailerio helps reduce that risk.
- The marketing budget is wasted when you send to invalid or inactive addresses. Verifying ahead of time saves money and improves ROI.
- When users sign up with fake or disposable email addresses, your downstream analysis, segmentation, engagement metrics, and deliverability suffer. Using Mailerio’s real‐time checks in your signup forms can stop that upstream.
Typical use cases
Here are some examples of how different users might use Mailerio:
- A marketer who has an email list collected over time wants to clean it before sending a big campaign → uses the bulk upload feature.
- A SaaS company that wants to validate each user email at signup to avoid fake accounts and protect the deliverability of their welcome and onboarding emails → uses the API/real-time integration.
- An agency working for multiple clients who want to segment lists by quality, provider, risk score, etc → uses the enrichment and reporting features.
- Any business worried about hitting blacklists, disposable/trap addresses, or degraded sender reputation wants to run periodic list cleaning or real-time checks.
- Cold outreach expert retrieving prospect lists from different tools, like Apollo, Clay, Zoom, needs to verify lists before sending to make sure recipients can actually receive an email to reduce bounces.
Who is Mailerio for
Mailerio is targeted at:
- Small to medium businesses (SMBs) and growth teams that run email campaigns and need clean lists.
- SaaS founders & creators who collect sign-ups and want to ensure the quality of those addresses. As one of their clients is a SaaS that sent confirmation emails to invalid addresses because users provided wrong emails, this mistake cost them months of their emails landing in spam.
- Agencies or marketing professionals managing multiple lists or clients who need reliable verification at scale.
- Developers and teams who want to integrate inbox validation into their systems via API.
What sets Mailerio apart
- Lighting fast processing: Mailerio can verify 10,000 emails in under 3 minutes. Which is 2x faster than the second-best verifier in the market.
- No hidden fees, we offer transparent pricing. 1 credit equals 1 validation. No extra charges apply.
- Full verification process for Yahoo, AOL emails, Mailerio is one of the few verifiers that provide this solution in the market.
- Automatic refunds for unknown emails
- Detailed API usage & reporting overview with more than 15 different factors and separate API reporting.