Hosting CheckerWebsite Audit
Menu
Bare Audit Field Notes

Make the web
make sense.

Clear, useful guides to the signals behind a better website. Start with the basics, then get practical.

12 field guides·Made for curious builders
The library

Ideas worth keeping.

05 / 12
Show
An illustrated map of an SPF policy and the sending services it namesEmail04
5 min read2026-10-16

SPF records, explained.

A clear guide to SPF syntax, sender authorization, and the checks to make before changing DNS.

Read the guide
An illustrated map showing SPF and DKIM identities aligning with a visible From domainEmail05
5 min read2026-10-16

DMARC records, explained.

Understand DMARC policy and alignment, then plan changes from real sending evidence and provider guidance.

Read the guide
A sender looks up a domain’s MX records, tries the lower preference value first, and can fall back if that server is unavailable.Email06
5 min read2026-10-20

MX records, explained.

MX records point senders toward mail servers. Read their priorities, distinguish no MX from Null MX, and change routing without interrupting delivery.

Read the guide
One SPF policy gathers approved senders in order and stops at its final all term.Email07
5 min read2026-10-20

Multiple SPF records? Fix the policy safely.

Two SPF records at one name do not merge. Inventory authorized senders, combine only verified instructions, and review nested DNS lookups before changing policy.

Read the guide
An illustrated email connected to its DKIM selector and signing domainEmail08
5 min read2026-10-16

How to find your DKIM selector

The clue is already in your email. Find the selector, pair it with the signing domain, and look up the right DNS record.

Read the guide
Showing 1–5 of 5 guides
Keep it practical

One good next step
beats ten vague ideas.

Check a page on Bare Audit