Email API & SMTP Relay

Send transactional or bulk emails effortlessly with the best Email API and SMTP Relay solution out there.

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Email API & SMTP Relay

Sending over 413+ million emails per month

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Built for Developers

Set up your email integration in no time. Integrate and deliver in minutes with our API SDKs or SMTP Relay. We have native API SDKs in all popular programming languages (NodeJS, PHP, Python, Ruby, Java, C#, Golang, Rust and more) and clear API documentation.

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Deliver with Confidence

Reach inbox and not spam - whether you are sending 10 emails or 10 million. Send from your domain with SPF, DKIM, DMARC and TRACK records. Get started quickly on our shared IPs or scale email sending on dedicated IPs with zero hassle.

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Personalise at Scale

Create great customer experiences by sending relevant and personalised emails. Leverage our custom fields or powerful if/else templating engine to make every email special for your recipients.

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Measure with Ease

Get detailed analytics about your email performance at sub-account, IP and group level. Get stats for deliverability, bounce, open, click rate either through our API or through our webhooks.

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AMPlify your Conversions

AMP emails bring a website like experience right inside the email. Your users don’t have to leave their inbox to take action whether it is filling a form, filling a survey or buying a product.

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Email API that Works

No more worrying about your emails hitting SPAM or not being able to track why your open rates are low. Easily send, track, measure and alert on your email sending with SendPost on time, every time.

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Everything you need

All-in-one platform

Simple email sending & validation API, powerful analytics, smart alerting system and power deliverability optimisation tools make SendPost standout as the most forward thinking email API service.

Email API & SMTP Relay
We have API SDKs present in over 14+ programming languages - Java, PHP, NodeJS, Ruby, Python etc. You can also connect us in old fashioned way using SMTP relay. Email API Feature Arrow
Sub-Accounts & Groups
Segregate your email sending for products, customers or email types using Sub-Accounts. Get detailed analytics for specific email types using groups. Email API Feature Arrow
Sub-Account & IP Stats
Know your deliverability, bounce, open and click rate at both sub-account and IP level. We show stats for aggregated SMTP errors and your inboxing on major ISPs - gmail, yahoo, outlook, aol etc. Email API Feature Arrow
Event Logging
Debug any deliverability issue based on a sub-account or IP by SMTP code, description, recipient, sender and more. 90 day log retention and super fast search. Email API Feature Arrow
Dedicated & Shared IPs
If you are getting started you can use our shared IP pools for email sending. For big senders, manage your own dedicated and shared IP pools. Email API Feature Arrow
Validation API
Clean your list by removing hard bounce, spam traps, invalid emails, email typos, honey pot email addresses and more. Email API Feature Arrow
Alerts & Notification
Setup automated alerts and notification through slack & email when specific sub-account or IP deliverability suffers or your hard bounce has increased. Email API Feature Arrow
Rate limiting, Throttling & Routing
For power users, you can control speed of email sending and throttling at an IP. You can also route emails from an IP Pool based on specific rules. Email API Feature Arrow
Get automatically notified on various email events. Process this data or integrate with your own application. Email API Feature Arrow
Deliverability CRM
Automated incident creation when your domain gets blacklisted, deliverability decreases or bounce percentage changes. Email API Feature Arrow

Trusted by developers, businesses and ESPs

Companies of all sizes are using SendPost to reliably deliver emails.

million emails sent
average deliverability
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