The modern enterprise mail server. Unified platform. Full sovereignty. 40% lower cost.

# Nativer Windows-Server-Dienst komplett OHNE Docker oder WSL2
New-Item -ItemType Directory -Force -Path "C:\SharpMailserver", "D:\SharpMailData" | Out-Null
Expand-Archive .\SharpMailserver-win-x64.zip -DestinationPath "C:\SharpMailserver" -Force

New-Service -Name "SharpMailserver" `
  -BinaryPathName '"C:\SharpMailserver\SharpMailserver.Server.exe" --contentRoot "C:\SharpMailserver"' `
  -DisplayName "SharpMailserver Enterprise Mail & GoBD Archive" `
  -StartupType Automatic
sc.exe failure SharpMailserver reset= 86400 actions= restart/5000/restart/5000/restart/10000
Start-Service SharpMailserver

# Enterprise Mail + Webmail PWA + GoBD Archive via Docker / Podman
services:
  sharpmail:
    image: registry.sharpmailserver.com/sharpmailserver:latest
    ports: ["25:25", "465:465", "587:587", "993:993", "4190:4190", "443:8443"]
    environment:
      Storage__Provider: "Postgres"        # or zero-config "Sqlite" WAL
      Storage__BlobBackend: "Hybrid"       # Local NVMe + S3 WORM Object Lock
      Storage__Compression: "Zstd"         # Content-addressed SHA-256 dedup
      Acme__AutoRenew: "true"              # Let's Encrypt HTTP-01 / TLS-ALPN

// Integrierte Transactional HTTP API mit Idempotency-Key & Dual-DKIM
using var http = new HttpClient { BaseAddress = new("https://mail.iqmeta.de") };
http.DefaultRequestHeaders.Add("X-Api-Key", Environment.GetEnvironmentVariable("SHARPMAIL_KEY"));
http.DefaultRequestHeaders.Add("Idempotency-Key", "inv-2026-0841");

var res = await http.PostAsJsonAsync("/api/v1/send", new {
    from = "billing@iqmeta.de",
    to = new[] { "accounting@customer.de" },
    subject = "ZUGFeRD Invoice #2026-0841",
    htmlBody = "<p>Please find your EN 16931 invoice attached.</p>"
});

# RFC 5228 Sieve: editierbar per ManageSieve (Port 4190) oder Visual Rule Builder
require ["fileinto", "vacation", "reject"];

if header :contains "X-ZUGFeRD-Detected" "true" {
    fileinto "Archive/Invoices-2026";
    stop;
}