Email tools, without the games
The big checkers are good tools wrapped in bad behaviour. Here's the difference, in writing.
| PHX Mail Tools | Typical big checker | |
|---|---|---|
| Account or sign-up | Never | Required for the full report |
| Full, deep report | Free, complete | $129–$499 / month |
| Daily limits | None that matter | As low as 3 tests a day |
| Your results | Private, on this page | Public to anyone with the link, deleted in 7 days |
| Fix instructions | Plain English + copy-paste records | "You need to know your acronyms" |
| Your data | Not stored, not sold | Feeds a sales pipeline |
| Business use on free tier | Of course | Sometimes banned after an "audit" |
Mail Tester — what's your spam score?
The health check tests your setup. This one will test an actual email — content, signature and all.
All free tools
Every tool is complete and free. No accounts, no "pro" version hiding the answer.
Email Health Check
SPF, DKIM, DMARC, MX and blacklists in one graded report — with fixes.
Mail Tester
Send a test email, get a spam score out of 10 and see every deduction.
Blacklist Check
Domain or IP checked against 30+ lists, with direct removal links.
DMARC Checker & Generator
Check your protection — or build a safe record in a minute.
SPF Generator
Build a correct SPF record without guessing at the syntax.
Header Analyzer
Paste an email header; see its route and whether it truly passed.
Why is this free?
Most email tools give you half an answer, then ask for your card. We think a check is a check — so ours is complete, free, and needs no account.
The site is paid for by the ads on this page. Your lookups are never stored and never sold. If a check can't be verified, the report will say so — we would rather show "couldn't verify" than invent a result.
Our promise, in one line: the same facilities the big tools charge for — without the walls, the limits and the sales calls.
SPF, DKIM and DMARC, in plain English
These three records decide whether your email is trusted or treated as junk. Since 2024, Gmail and Yahoo require all three for regular senders — missing one is the most common reason legitimate email lands in spam or gets rejected.
What is SPF?
SPF is a public list, stored in your domain's DNS, of the servers allowed to send email for you. If a message comes from a server that isn't on the list, receivers know it's suspicious. An SPF checker reads this list and tells you if it's valid — and whether it ends in a strict -all or a weak ~all.
What is DKIM?
DKIM adds a digital signature to every email you send. The receiving server checks the signature against a key published in your DNS, proving the message really came from you and wasn't altered on the way. No signature, no proof — and bulk email without it is treated as risky.
What is DMARC?
DMARC is the instruction sheet: it tells Gmail, Yahoo and Outlook what to do when an email claims to be from your domain but fails the SPF or DKIM check — deliver it, send it to spam (p=quarantine), or reject it outright (p=reject). Without DMARC, anyone can send email pretending to be you.
Why are my emails going to spam?
The most common causes are a missing or broken SPF, DKIM or DMARC record, or a listing on a public blacklist. The free health check at the top of this page tests all of them at once and gives you the exact fix for each problem — that's your email deliverability baseline, sorted in minutes.
Common questions
What does the grade mean?
Your grade combines five checks. A means your email is authenticated and your domain is protected. F usually means anyone can send email pretending to be your domain — the fixes in your report close that hole, most in minutes.
Gmail is rejecting my emails. Will this help?
Yes. Since 2024, Gmail and Yahoo require SPF, DKIM and DMARC for regular senders. This check shows which of the three is missing or broken, and gives you the exact record to add.
A good score means my email always lands in the inbox, right?
Not quite — and we won't pretend otherwise. These checks prove your setup is correct. Where a message lands also depends on content and reputation. A clean setup is the part you fully control, and it's where most failures start.
Do you store the domains I check?
No. Checks run live against public DNS records and the results are not kept.
Can I use this for my business?
Yes — that's who it's for. There is no "personal use only" rule here.