Let agents verify every email before you send
QX checks each address through Mailcheck and weeds out the risky ones—so your campaigns land in real inboxes and your sender reputation stays clean.
Stop blasting bad addresses, burning domains, and watching reply rates tank. Let an agent verify first.
Lists that clean themselves
Every contact you pull from a CRM, scraper or signup form gets checked automatically—invalid, catch-all and role addresses removed before they ever touch a campaign.
Protect your sender reputation
Stop bounces at the door. Risky addresses get flagged and held back so your domain stays warm, your spam complaints stay low, and good emails actually get through.
Block junk at the front door
Trial signups, demo requests and form submissions get verified the moment they arrive—fake addresses rejected, real prospects routed to sales without a second of delay.
Mailcheck
Real workflows, built for your team
Build workflows in minutes that chain Mailcheck together with the rest of your stack. Trigger them on specific events, on a schedule, or on demand.
Sales: Verify every prospect before outreach
Every Monday at 9am
Scheduled trigger
Pull new target contacts
in Apollo
Verify each email address
in Mailcheck
Drop invalid and risky addresses
Agent step
Create clean contact records
in Salesforce
Queue personalized intros
in Gmail
QX agents can verify any email address through Mailcheck—one at a time or thousands at a clip
About Mailcheck
Mailcheck is an email verification service that validates addresses in real time to confirm they exist, accept mail, and aren't disposable or catch-all. Marketing, sales and product teams use it to scrub lists, protect deliverability, and stop fake signups—making it a natural fit for any workflow that touches email.
About QX Labs
QX is an AI agent platform that helps you build, run and scale AI across your team in a few clicks. Create agents that connect to your data and 1,000+ apps, building institutional memory that gets sharper every run. Then delegate tasks to them from where you already work—Slack, Teams, WhatsApp or email.
See Mailcheck working inside your stack
Want an AI co-worker that verifies every address before you send? Book a demo call to talk through your use cases, or get started for free.
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