# Proofpoint Secure Email Relay (SER) Email Submission API

**Canonical:** https://apis.io/apis/proofpoint/proofpoint-secure-email-relay/  
**Provider:** Proofpoint — https://apis.io/providers/proofpoint/  
**Base URL:** https://mail.ser.proofpoint.com  
**Documentation:** https://api-docs.ser.proofpoint.com/docs/email-submission

Proofpoint Secure Email Relay (SER) Email Submission API is one of 7 APIs that [Proofpoint](https://apis.io/providers/proofpoint/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Email, DMARC, and Transactional Email. The published artifact set on APIs.io includes an API reference.

Secure Email Relay lets applications send authenticated transactional mail through Proofpoint rather than through an unmanaged relay, which is what makes a strict DMARC policy achievable. The Email Submission API accepts a message at mail.ser.proofpoint.com after an OAuth client-credential exchange; Proofpoint ships first-party client libraries for Python, Java and .NET against it.

## Machine-readable artifacts (2)

- **APIReference** — https://api-docs.ser.proofpoint.com/docs/email-submission
- **SDKs** — https://raw.githubusercontent.com/api-evangelist/proofpoint/refs/heads/main/packages/proofpoint-packages.yml

## Other Proofpoint APIs (6)

- [Proofpoint Targeted Attack Protection (TAP) API v2](https://apis.io/apis/proofpoint/proofpoint-tap/)
- [Proofpoint Threat Protection Dashboard Reports API v1](https://apis.io/apis/proofpoint/proofpoint-threat-protection-reports/)
- [Emerging Threats (ET) Intelligence Query API v1](https://apis.io/apis/proofpoint/proofpoint-et-intelligence/)
- [Proofpoint Security Awareness Training (ZenGuide) Results API](https://apis.io/apis/proofpoint/proofpoint-psat-results/)
- [Proofpoint Essentials Threat (SIEM) API](https://apis.io/apis/proofpoint/proofpoint-essentials-siem/)
- [Proofpoint on Demand (PoD) Log API](https://apis.io/apis/proofpoint/proofpoint-pod-log/)

## Tags

Email, DMARC, Transactional Email

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/proofpoint/proofpoint-secure-email-relay/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/proofpoint/.