Hands-on case study

Testing $12/year hosting: ServerByt email, SPF, DKIM and DMARC

I tested ServerByt Blaze with my own domain, external authoritative DNS, and real Gmail delivery checks to see whether ultra-low-cost hosting could provide technically sound custom-domain email.

Daniel Castle • TEGISZ Lab • November 7, 2026 • Initial hands-on test

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Disclosure: This is not sponsored content. I purchased the service myself. This article documents my initial setup and hands-on results, not long-term uptime or reliability.

Why I tested it

The ServerByt Blaze plan was unusually inexpensive at $12/year when I purchased it. My main question was not whether I could create a mailbox, but whether mail from that domain could reach a major provider with proper authentication and land in the inbox.

Test environment

I intentionally kept authoritative DNS at Spaceship instead of moving the domain's nameservers to ServerByt. That meant the records ServerByt generated had to be published in the actual authoritative DNS zone.

Architecture:
sziget.me
   |
   +-- Authoritative DNS: Spaceship
   |      +-- MX --------> Stackmail
   |      +-- SPF -------> authorized senders
   |      +-- DKIM ------> public key
   |      +-- DMARC -----> authentication policy
   |      +-- webmail ---> StackCP
   |
   +-- Email hosting: ServerByt / Stackmail
ServerByt DNS zone for the sziget.me test domain
The test DNS zone, including Stackmail MX, mail, IMAP, SMTP, SPF, DKIM and DMARC records.

SPF

I published the Stackmail authorization in DNS:

v=spf1 include:spf.stackmail.com a mx -all

Gmail result: SPF: PASS.

DKIM

I generated DKIM through ServerByt's Domainkeys interface using selector s1, then published the public key at the authoritative DNS provider.

ServerByt DKIM configuration for sziget.me
DKIM for the sziget.me test domain: selector s1, Enabled.

Gmail result: DKIM: PASS.

DMARC

For the initial test I used a p=none monitoring policy with relaxed DKIM and SPF alignment. This let me validate alignment without immediately requesting quarantine or rejection of failures.

ServerByt DMARC configuration for sziget.me
Initial DMARC configuration: p=none with relaxed DKIM and SPF alignment.

After DNS propagation, Gmail reported DMARC: PASS.

Final result

PASS ✓SPF
PASS ✓DKIM
PASS ✓DMARC
INBOX ✓Gmail
Gmail authentication results showing SPF, DKIM and DMARC pass
Gmail authentication result: SPF PASS, DKIM PASS and DMARC PASS.

One Gmail test reported roughly 3 seconds of delivery time. The message landed directly in Inbox rather than Spam. A reverse Gmail-to-Stackmail test also arrived essentially immediately.

What worked well

Quirks I encountered

External DNS

ServerByt shows a DNS Zone inside its control panel, but those records are not authoritative when the domain uses different nameservers. Because Spaceship remained authoritative for sziget.me, I had to publish the required mail records there.

Webmail redirect

The Webmail button for a mailbox on a secondary domain initially tried to open the webmail hostname of the hosting account's primary domain. Opening the correct webmail.sziget.me hostname directly worked.

Payment process

Checkout was not completely smooth in my case. I had to repeat the payment process several times before the purchase completed.

What this lab demonstrated

The most useful lesson was the separation of roles between registrar, authoritative DNS provider, web host and email provider. A DNS record shown inside a hosting control panel does not matter to the public Internet unless it exists in the authoritative DNS zone.

Initial verdict

For $12/year, the first technical result was surprisingly strong:

SPF PASS + DKIM PASS + DMARC PASS + Gmail Inbox

This is still an initial hands-on test, not a long-term endorsement. Before using the service for business-critical workloads, I would want longer testing of uptime, backups, support and application performance.

Next tests

30-day update: I will update this section after longer-term use.

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