NulNetMail Server VPS — Port 25, PTR, No KYC, Crypto
Self-host Mailcow, Postfix or Stalwart on a VPS with port 25 open and editable PTR/FCrDNS. No ID step. Zurich or Amsterdam. Crypto invoice.
Le corps de l'article est en anglais. L'interface, le catalogue et la caisse sont traduits.
What people actually run
Postfix documentation remains the common MTA; Stalwart Mail Server is the modern all-in-one, and Mailcow wraps the classic stack in a panel. The platform facts stay the same under any of them: port 25 open inbound and outbound with no unblock ticket, PTR editable after deploy, FCrDNS alignment on you. Reputation is the part nobody sells — whatever the payment rail, a fresh IP starts cold and warms by what it sends.
VPS from $3* (fund $50+), storage 1–5 TB NVMe from $24/mo annual-eff, dedicated with IPMI from $30.80/mo. Crypto invoice, no KYC.
Launch nowPlaybook
- Warden to start. Dedicated if you are a public MX for many domains.
- Install Postfix documentation or Stalwart Mail Server. Set SPF/DKIM/DMARC on your domain.
- Switzerland is the process default. Netherlands if you want AMS-IX and accept EU rack law.
Sizing and placement
A single-domain MTA is a light process — Warden ($19.00 list, $15.20 annual-eff) carries queues, spam filtering and webmail comfortably. A public MX for many domains wants isolation: Shield metal ($38.50 list, $30.80 annual-eff) is the catalog's mail pick with 8c/16t, 32 GB ECC and a clean IPv4, per the dedicated catalog. Placement: Zurich when process quality is the story, Amsterdam when EU recipients dominate latency budgets. Before ordering, the port-25 ranking compares hosts that still ship the port open.
Limits
The host will not whitelist your domain at Gmail or pre-warm any IP — deliverability is earned by SPF/DKIM/DMARC discipline and sending history. Spam and CSAM are AUP failures that end the account; a mail server changes neither fact.
Is PTR editable?
Yes, from the panel once the VPS or dedicated unit is provisioned — set it to match the MX hostname and keep FCrDNS aligned before the first send.
Can the box be an IPv6 MX?
Yes. Dual-stack is standard on every VPS: an AAAA record plus the /64 that ships with each plan covers IPv6 delivery alongside IPv4.
Is port 25 inbound and outbound open?
Yes, on VPS and dedicated alike, with no unblock ticket and no throughput tax — the port ships open the way the ranking pages assume it no longer does.
Do you KYC mail operators?
No. An email or a 32-character token plus a 12-character password opens the account, crypto settles it — and the reputation work at Gmail stays yours either way.
Ready to launch?
Build the box — VPS, storage or bare metal — create the password, pay the invoice that follows.