Email API +
SMTP Relay
We provide developers, businesses and ESPs with tools, expertise and support needed to reliably deliver, measure and optimise emails so they reach your customers' inboxes on time, every time.
Sending over 413+ million emails per month
Why SendPost?
The real problem comes if you are one of the big senders—sending millions of emails per month. That's when managing multiple sending domains, IP-Pools and IP/Domain reputation becomes a severe headache. At that scale, even a minor dip in your email open rate or deliverability impacts your revenue.
You want a solution which helps you understand what broke with your email deliverability and how you can fix it quickly. You don't want to spend hours wading through logs and manually checking if your domain or IP is blacklisted or your sending reputation is low.
You want to be alerted in advance when your deliverability is starting to drop. Infact you want a solution which can act on your behalf to prevent that from happening.
You want a reliable partner, powered with a kickass software, who understands how critical email is for your business. And that is why we have built SendPost.
Send Reliably. Measure Easily.
Simple & Powerful email sending & validation API. Measure detailed deliverability stats, find most common SMTP errors or search through event logs with ease.
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Email API & SMTP Relay
We have API SDKs in 14+ programming languages. You can use our API to send and validate emails, measure stats and manage domains/IPs. Integration is dead simple. You can also connect and deliver in minutes using our tried-and-tested SMTP relay.
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Detailed Deliverability Stats
Get detailed deliverability stats for both your sub-account and IP, email ISP stats, and aggregate SMTP error stats. Figure out why your inboxing or open rates are bad, who is responsible for it, and how you can fix it.
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IP Reputation & Blacklist Tracking
We automatically retrieve and show you IP reputation and blacklisting details of your various sending IPs so that you can take corrective action. No more spending hours everyday to manually get this data.
Alert Smartly. Optimise Powerfully.
SendPost works great for developers but it really stands out if you are a large email sender or an ESP. You can setup smart alerts and notifications to know issues in advance. You can optimise your email inboxing by controlling email sending speed, throttling, having correct backoff strategy and IP routing.
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Smart Alerts & Notifications
Want to get automatically notified when your IP is in a blacklist, your hardbounce more than 5% or deliverability below 90% ? You can setup smart alerts on SendPost to get notified on Slack or email when any such thing happens.
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Dedicated IPs & IP-Pools
You can manage both shared and dedicated IP pools. You have auto-warmup and advanced IP routing based on receiving domain or email volume.
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Rate Limiting, Throttling & Backoff
Reduce email sending rate or throttling for a specific email ISP - gmail, yahoo, aol, outlook etc. In case of hardbounce make this automated for consistent kickass inboxing.
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.
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.
Trusted by developers, businesses and ESPs
Companies of all sizes are using SendPost to reliably deliver emails.