Every email verification feature, in one tool.
29 capabilities across 7 categories. 8 have a dedicated deep-dive page with mockups, problem framing, and customer outcomes.
Capabilities
Everything Mailcleaner ships with.
Layered checks
Risk and confidence
Bulk list cleaning
Suppressions and re-checks
Domain audit
API and widget
- Capabilities
- 29
- Categories
- 7
- Deep-dive pages
- 8
- Login and bill with every Flaxxa app
- 1
01 / 07
Verification
One address or a whole list, with a clear verdict.
4 capabilities
Single check
A verdict for one address in seconds, with risk score, confidence score and mail server details.
Bulk jobs
Paste a list or upload a CSV, TSV, TXT or XLSX file of up to 25 MB; jobs run in the background with progress and per-verdict counts.
Check depths
Quick (syntax and MX), Standard (adds the SMTP and catch-all checks), Deep and Premium (extra signals), where your plan includes them.
Eight verdicts
Valid, invalid, risky, catch-all, disposable, role-based, unknown or abuse, each with a reason code.
02 / 07
The checks
Layered, cheapest first.
6 capabilities
Syntax and typos
Format validation and a typo fixer that turns gmial.com into gmail.com, with a free typo scan before a list runs.
Disposable and role
Deep diveFlags known throwaway domains, refreshed weekly from public lists, and shared addresses such as info@ and sales@.
Read the Disposable email checker deep-dive →MX and SMTP
Looks up the domain's mail servers and asks the server whether the mailbox exists, without sending a message.
Catch-all detection
Deep diveTests the server with an address that can't exist; if it is accepted, the domain is reported as catch-all.
Read the Catch-all detection deep-dive →Deep signals
Spam-trap patterns and a domain blocklist lookup (Spamhaus DBL and SURBL) on Deep and Premium checks.
Greylisting retries
Servers that ask for a retry are re-checked automatically, up to five times with growing gaps.
03 / 07
Scoring
A number you can act on.
3 capabilities
Risk score
A 0–100 risk score so you can set your own send and hold-back thresholds.
Confidence score
A 0–100 score for how sure the verdict is.
Signals
The checks and weights that produced each verdict.
04 / 07
List hygiene
Clean once, then keep it clean.
4 capabilities
Suppression list
Deep diveA do-not-mail list with reasons, fed by bounces and complaints from Flaxxa email campaigns, manual adds and imports.
Read the List cleaning deep-dive →Clean export
Download results as CSV or XLSX, filtered by verdict, with the columns you choose.
Reuse window
An address with a recent final verdict is reused free instead of being checked again.
Scheduled re-checks
Deep diveRe-check a connected email marketing tool or CRM daily, weekly, monthly or quarterly.
Read the The checks deep-dive →
05 / 07
Domain checks
The sending side of deliverability.
4 capabilities
Authentication audit
SPF, DKIM, DMARC, BIMI, MTA-STS and TLS-RPT checked in one audit.
Suggested DNS records
The SPF, DMARC and BIMI records to add, and a DKIM template for your key.
Provider requirements
Whether the domain meets the Gmail, Yahoo and Microsoft sender requirements for authentication.
Mail server test
MX, SMTP, STARTTLS, SPF, DKIM, DMARC and blocklist checks, graded A to F.
06 / 07
API and widget
Verify inside your own product.
4 capabilities
REST API
Deep diveSingle checks, batches of up to 1,000, file uploads and results, with full-access or read-only workspace keys.
Read the API and widget deep-dive →Webhooks
HMAC-SHA256 signed events for jobs, verifications, suppressions and audits, retried with backoff.
Form widget
Deep diveA quick check (format, typos, disposable and mail servers) on your sign-up and lead forms that blocks invalid and disposable addresses and suggests typo fixes.
Read the API and widget deep-dive →Result explainer
Plain-language explanations of a verdict and a prioritised list of DNS fixes, written by rules, on plans that include it.
07 / 07
Integrations and billing
Connected to your tools and your bill.
4 capabilities
Email tool import
Deep divePull lists from Mailchimp, Brevo, MailerLite, GetResponse, ConvertKit, HubSpot and AWeber, or a file from Google Drive.
Read the Email verification deep-dive →Write-back
Optionally tag bad addresses back in the email tool, or unsubscribe them (tagging only for HubSpot).
Flaxxa contacts
Optionally verify new contacts as they are added to your Flaxxa workspace.
One balance
Checks spend credits from the workspace's one credit balance, shared with the AI features in other Flaxxa apps.
Every feature inherits the platform.
Sign-in, billing, your team, roles and the audit log come from the Flaxxa workspace, so Flaxxa Mailcleaner works alongside the other Flaxxa apps on one account.
Flaxxa Mailcleaner features: common questions
Flaxxa Mailcleaner checks the address syntax, looks for likely typos, flags disposable and role addresses, looks up the domain's mail servers (MX), asks the mail server whether the mailbox exists (an SMTP check, without sending a message) and detects catch-all domains. Deeper checks add spam-trap patterns and a domain blocklist lookup.
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