---
title: "Check if mail server exists"
description: "Check if a mail server with **`ID`** exists, but do not return its data. Requires no specific permission."
canonical_url: "https://www.zeyos.com/api/exists-mail-server"
markdown_url: "https://www.zeyos.com/ai/guide/api/exists-mail-server.md"
section: "api-reference"
authority: "reference"
language: "en"
source_repository: "https://cloud.zeyos.com/__doc/openapi/api.json"
source_sha256: "f5850c6fa6f99a1b518fc8ddc4e566070b53b5506cde57a3299948d38fc6363c"
---

# Check if mail server exists

`HEAD /mailservers/{ID}`

- Summary: Check if mail server exists
- OperationId: existsMailServer
- Description: Check if a mail server with **`ID`** exists, but do not return its data. Requires no specific permission.

Parameters:
- #/components/parameters/ID
- #/components/parameters/If-Modified-Since
- #/components/parameters/If-None-Match

Request body:
- (none)

Responses:
- 204: #/components/responses/204-exists
- 304 — Not Modified
- 401: #/components/responses/401
- 404 — Not Found
- 500: #/components/responses/500

Full tag reference: /ai/openapi/tag.mailservers.md
OpenAPI slice: /ai/openapi/tag.mailservers.openapi.json