The records are fiddly
One mistake in SPF or DMARC can send your mail to spam.
Mailcleaner · Domain checks
An SPF, DKIM and DMARC checker with copy-paste fixes.
Clean addresses only help if receiving servers trust your domain. The Flaxxa Mailcleaner domain audit checks six authentication records, shows whether you meet Gmail, Yahoo and Microsoft requirements, and suggests the DNS records to add. A mail server test grades the rest.
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mailcleaner.flaxxa.com / deliverability
yourbrand.com
Auth audit- SPFpass
- DKIMpass
- DMARC+ add TXT record
✓ Gmail✓ Yahoo⚠ Microsoft
copy-paste fixes- SPF to TLS-RPT
- 6 records
- Ready to paste
- DNS fixes
- And Microsoft checks
- Gmail · Yahoo
- Mail server grade
- A–F
01 / 04
Why check your domain's email authentication?
The rules got stricter
Gmail and Yahoo now expect bulk senders to authenticate properly.
Problems are invisible
A broken record rarely announces itself until delivery drops.
02 / 04
How does the domain audit work?
Enter your domain
The audit reads SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT from DNS.
See what's wrong
Each record gets a status, and the domain gets a score out of 100.
Copy the fix
Suggested records come ready to paste into your DNS.
Test the server
The mail server test checks MX, SMTP, STARTTLS and blocklists, and grades it.
03 / 04
What does the audit check?
SPF
The record, its lookup count, and a too-open +all or ?all.
DKIM
Looks for keys under 16 common selector names.
DMARC
Policy, percentage, alignment and report addresses.
BIMI
The record, logo location and certificate.
MTA-STS and TLS-RPT
Whether the records are published.
Rule-based fix plan
A prioritised list of fixes with the DNS records, on plans that include it.
04 / 04
What does a healthy domain change?
Your verified list, delivered.
More mail in the inbox
Authenticated mail is trusted more by receivers.
Meet the requirements
See Gmail, Yahoo and Microsoft status at a glance.
Fixes, not jargon
The records to add, ready to paste.
Keep exploring
More Mailcleaner capabilities
Email verification
Verify one email address or a whole list: a verdict, a 0–100 risk score and a confidence score for each, from a paste, a file, Google Drive or the API.
List cleaning
Clean an email list in one upload: counts per verdict, a clean CSV or XLSX export, and a suppression list so bad addresses don't creep back in.
The checks
The checks behind each verdict: syntax, typo, disposable and role detection, MX lookup, an SMTP mailbox check, catch-all detection and deeper signals.
FAQ
Domain checks: common questions
SPF lists the servers allowed to send for your domain, DKIM signs each message so it can't be altered, and DMARC tells receivers what to do when those checks fail. Together they prove mail really comes from you.
Get started in minutes
Try Flaxxa Mailcleaner free.
Spin up a workspace and put Domain checks through its paces.
Free plan · No credit card · Cancel anytime