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Email API for ESPs

Email service providers have unique requirements. You may have thousands of customers and sending domains. You may need thousands of IPs both shared and dedicated and would like to warm them up quickly. Your customer quality may be a bit all over the place. You may need power tools for debugging and fixing email deliverability issues. You may need a system which pro-actively alerts you when things are beginning to break and do incident management (and magically fix them for you).

SendPost does all of this and way way more. Schedule a personalised demo to know more about our ESP offering.

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SendPost - the ONLY email API solution for ESPs?

As an ESP you have unique requirements. You may have anywhere from 100's to tens of thousands of customers - some are bad and others good. You have to maintain large number of IPs, domains and IP Pools not to forget doing proper IP & domain warmup. Some customers may be on dedicated IPs and others may be on shared. We understand this.

No matter what you do, email deliverability will break for some or the other customer of yours. You want an email API system which lets you quickly diagnose what is the problem ( IP or bad sender ), when and how it started happening ( SMTP errors, ISP errors) and be alerted quickly so damage can be minimised (alerts & notifications).

We at SendPost do all this and more. You have an email deliverability CRM to manage incidents based on customer priority or severity. You can use our pro deliverability tools to control email sending speed, email routing and throttling. Oh and we also integrate with best in class tools - GlockApps, ReturnPath, 250OK and more. You can also setup webhooks and process custom headers to integrate SendPost data with your application.

We are the only email API platform built ground up for ESPs. No more hacks and fiddling with old arcane email API systems and trying to make them work for you. Get an email API system which understands your needs and is specifically built for you.

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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

The ONLY email API solution built for ESPs

No-nonsense email API & SMTP Relay solution built for ESPs. Right from ip-pools (dedicated & shared) to pro deliverability tools (email rate limiting, routing & throttling), from detailed email analytics (SMTP, ISP, IP and sub-account stats) to smart alerts & notifications on deliverability issues - we have got you covered.
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