Hosting Glossary
DKIM (DomainKeys Identified Mail)
What DKIM actually means, minus the jargon — with the example that makes it obvious.
The short answer
DKIM cryptographically signs outgoing mail so receivers can verify it came from your domain and wasn't altered in transit.
Below: the fuller explanation, an analogy that makes it stick, why it matters in practice, and where you'll actually meet it.
0
Jargon left unexplained
100+
Linked definitions
Real
Platform examples
Free
To read, obviously
The mail server signs each message with a private key; the matching public key sits in DNS (a selector TXT record) for receivers to check. Unlike SPF, the signature travels inside the message — surviving forwarding.
Each sending service signs with its own selector, so multiple keys coexist — hosting mail, newsletters and CRMs all verifiable independently.
The analogy version
A wax seal on each letter, checkable against your published seal registry — intact seal proves origin and untampered contents, wherever the letter was relayed.
Analogies simplify, of course — but this one holds up well enough to reason with, and reasoning is the point of a glossary.
The practical stakes
DKIM alignment feeds sender reputation and enables DMARC enforcement — it's plumbing whose absence surfaces as spam-folder placement, and whose setup is often one panel click plus a DNS record.
You don't need to operate this layer daily — you need to recognise it when it's the explanation for something, which is exactly when this page pays for itself.
A concrete example
A forwarded invoice still verifies at its final destination — the DKIM seal inside the message survives the forwarding hop that broke SPF's server check.
Multiply that example across every site on the internet and you have the concept's entire job description.
The HostingAlly angle
You'll meet it in the control panel and occasionally in a support conversation — usually already configured the right way. If this term made sense, the natural next reads are SPF, DMARC, TXT Record and SMTP.
Renewal prices match signup prices, so the year-two invoice is the most boring email you'll get from us.

Jargon is a service failure
We think unexplained jargon is a service failure — this glossary is the support desk's accumulated translations, published where the search engines can hand them out.
Business email on your own domain is included, not sold back as an add-on.
- 100+ terms, plain English
- Analogies and real examples
- Cross-linked related concepts
- Written by the support desk
Why HostingAlly
What you get with every plan
Plain English first
Every term defined for site owners, not for other sysadmins — jargon translated, not restated.
Grounded in a real platform
Examples reference the hosting you'd actually use, not abstract diagrams.
Honest about what you can skip
Most terms are recognise-level, not operate-level — the glossary says which is which.
Analogies that stick
Each concept gets a picture you'll remember at the moment you actually need it.
Linked, not siloed
Related terms cross-reference, so one lookup becomes a working understanding.
The practical stakes named
Not just what it is — when it's the answer to a problem you're having.
Getting Started
How to get going
- 1
Spot it in your own setup
The fastest way to learn a hosting term is to find it in your own panel — five minutes of looking beats an hour of reading.
- 2
Check the defaults
Confirm how your account has this configured — usually correctly by default here, and now you'll know rather than guess.
- 3
Follow the related terms
Concepts travel in packs — SPF, DMARC and TXT Record complete this one's picture, and each is a two-minute read away.
Included
What's covered on our plans
- 99.9% uptime commitment, monitored around the clock
- Free domain for the first year on annual plans
- No setup fees, ever
- Daily automatic backups with self-service restores
- One-click installer for WordPress and 400+ apps
- SSH, Git and Composer access on developer-friendly plans
- NVMe SSD storage as standard
- Renewal prices that match signup prices
- Free website migration handled by our team
- 24/7 support from real people
FAQ
Your questions, answered
Do I need both SPF and DKIM?
Yes — they fail differently (SPF breaks on forwarding, DKIM on certain content rewriting) and DMARC passes on either aligning. The pair plus DMARC is the standard tripod modern receivers expect.
What's a DKIM selector?
The name prefix locating each key in DNS (selector._domainkey.domain) — allowing multiple signing services per domain. Your host's panel and each platform's settings show their own selectors to publish.
Which control panel do you provide?
cPanel — the industry standard, which means every tutorial on the internet matches your screen, your backups restore anywhere cPanel runs, and skills learned here transfer for life. Plesk and DirectAdmin options exist on specific plans for those who prefer them.
How long does it take to get started?
Minutes — hosting activates on payment, the domain (free for year one on annual plans) connects immediately, and one-click installers put WordPress or 400+ other apps live the same sitting. If you have an existing site, our team migrates it free, usually within 24 hours.
Do prices go up at renewal?
No — the price you sign up at is the price you renew at. We don't run teaser-rate economics, so there's no year-two ambush to plan around, and your bookkeeping can rely on the number staying put.
Do you include email with hosting?
Yes — mailboxes on your own domain come with every hosting plan, with webmail, IMAP/POP/SMTP access and spam filtering. Standalone email hosting also exists for domains whose websites live elsewhere.
Is there a money-back guarantee?
Yes — try the hosting properly and if it doesn't fit, the refund process is a request, not a retention gauntlet. Domain registrations are the one standard carve-out, since registries make those non-refundable the moment they're placed.
Keep exploring
TXT Record
A TXT record stores arbitrary text in your DNS zone — the mechanism behind domain verifications, SPF polici…
DMARC
DMARC is the policy layer over SPF and DKIM — telling receivers what to do with mail that fails authenticat…
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