---
title: "Open New Mail Window"
method: POST
path: "/ui/openwindow/newmail"
tags: ["User Interface"]
---

# Open New Mail Window

`POST /ui/openwindow/newmail`

Open the New Mail window, according to settings from the request if applicable

## Headers

- `Accept-Language` 'en' | 'de' | 'fr' | 'ja' | 'ru' | 'zh' | 'ko' | 'es'
- `If-None-Match` string
- `X-Compatibility-Date` '2025-12-16', date, required
- `X-Tenant` string

## Request body

- object
  - `body` string, required
  - `recipients` integer[], required
  - `subject` string, required
  - `to_corp_or_alliance_id` integer
  - `to_mailing_list_id` integer — Corporations, alliances and mailing lists are all types of mailing groups. You may only send to one mailing group, at a time, so you may fill out either this field or the to_corp_or_alliance_ids field

## Response `204`

Open window request received

## Other responses

- `default` — Error

---

[API](https://skmtc.net/evemonk/apis/eve-stable-infrastructure-esi-tranquility.md) · [All operations](https://skmtc.net/evemonk/apis/eve-stable-infrastructure-esi-tranquility/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/evemonk/eve-stable-infrastructure-esi-tranquility/versions/7bad2f0024dd/schema)