Let agents verify every email before you send
QX checks addresses against Mailboxlayer in real time—so your outreach lands in real inboxes and your sender reputation stays clean, without anyone scrubbing lists.
Stop sending into the void, burning your domain reputation, and chasing bounces. Hand verification to an agent.
Clean lists, automatically
Drop in any contact list and an agent runs every address through Mailboxlayer—flagging invalid, disposable and catch-all emails before a single campaign goes out.
Block junk at the door
Every signup or lead form submission gets verified the moment it arrives—so fake addresses, typos and throwaway domains never pollute your CRM or marketing tools.
Protect your sender score
Agents check addresses before each send, route risky ones to a separate path, and keep your bounce rate low—so emails from real people actually reach real inboxes.
Mailboxlayer
Real workflows, built for your team
Build workflows in minutes that chain Mailboxlayer with the rest of your stack. Trigger them on specific events, on a schedule, or on demand.
Marketing: Scrub every list before the send
Every Monday at 7am
Scheduled trigger
Pull this week's send list
in HubSpot
Verify each address
in Mailboxlayer
Tag invalid & risky contacts
Agent step
Suppress bad addresses
in HubSpot
Post cleanup summary
Alert via Slack
QX agents can validate email addresses against Mailboxlayer's checks—syntax, domain, SMTP and more
About Mailboxlayer
Mailboxlayer is a widely used REST API for email address validation, trusted by thousands of businesses to keep their mailing lists healthy. It checks syntax, domain records, SMTP reachability, disposable and free-mail providers, role accounts and quality scores—everything needed to weed out bad addresses before they damage deliverability.
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 Mailboxlayer working inside your stack
Want an AI co-worker that keeps your contact lists clean and your deliverability high? Book a demo to talk through your use case, or get started for free.
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