Protect your sender reputation and improve deliverability by validating every email — instantly or in bulk.
Keep your email lists clean and your campaigns effective. Our fast, secure, and comprehensive validation system helps ensure every email counts.
Prevent bounces and spam issues by verifying email addresses before sending.
Validate emails instantly via API or upload lists for bulk cleansing.
Integrate fast with API keys, SDKs, and secure protocols.
Validate emails via REST API or CSV upload. Fast response. Clean data. Better inboxing.
Use either account or sub-account level API keys in your headers to authenticate requests.
Use `/api/v1/account/validate` for batch lists or validate single addresses with real-time lookup.
Check MX records, detect spam traps, and take proactive action to clean your list.
Everything you need to know about SendX and email marketing
You get validation results in milliseconds for individual emails. Bulk uploads are processed efficiently and return status updates via API.
Our API detects MX failures, disposable domains, common typos, spam traps, and honeypot addresses.
Yes! We offer SDKs in 14+ languages and use standard REST principles with clear auth headers and JSON responses.
Absolutely. SendPost is designed for developers. We offer a robust Email API, SMTP relay service, and SDKs in over 14 programming languages. Additionally, our Email Webhooks allow you to receive real-time event data directly in your application for seamless integration and workflow automation.
Yes, we offer a very generous free forever plan that includes up to 25,000 free emails every month. This plan is designed to give you the freedom to build, test, and fully integrate SendPost into your application without any cost or commitment. No credit card is required to sign up.
Still have questions? We're here to help.
Join thousands of developers and businesses who trust SendPost's powerful API and infrastructure to deliver their most important emails.
Get instant alerts and automate incident tracking to maintain high inbox rates and protect your sender reputation.
Send, track, and manage emails with our powerful SMTP and HTTP Email API — engineered for deliverability, scale, and speed.
Resolve inboxing issues fast with incident tracking, root cause analysis, and historical resolution logs.
Measure, monitor, and fix deliverability issues with real-time insights from every email stream, IP, or ISP.
Uncover exactly what happened to your emails — with full transparency, search, and retention for up to a year.
Track every email event as it happens and automate your business logic effortlessly with real-time webhooks.
