Two ways to use the tools. The web versions at spotzee.com/tools support one-off browser checks. The Extended API versions documented here run on credit-based pricing: every Spotzee account starts with $1 starter credit, then each call deducts a small per-call amount from that balance (figures vary by tool, see the Spotzee pricing page for live numbers). Pick the web version for one-off checks, the API for batch or automated workflows.
Use the tool when you need a single answer fast. Read the guide when you need to know what the answer means, what to do about it, and where it fits in the broader workflow.
Pick a tool by intent
Email validation
Tools that check whether an address is real, who hosts it, and whether the domain is set up to receive mail.Email syntax validator
Check any address against RFC 5321 / 5322 format rules. Runs in-browser, no API call.
Email provider check
Identify the mailbox host (Gmail, Microsoft 365, iCloud, custom) for any domain.
Email health check
Audit SPF, DKIM, DMARC, BIMI, MTA-STS, TLS-RPT, CAA and blacklist status in one scan.
Disposable email checker
Flag throwaway addresses against an open-source list of 55,000+ known providers.
Email spam checker
Send a test message and score SPF, DKIM, DMARC, blacklists, content and links across nine signal groups.
Email address validator
Validate syntax, MX records, SMTP deliverability, disposable status and role detection for any address.
DNS & auth
Tools for resolving and auditing the DNS records that underpin email authentication.SPF lookup
Resolve any domain’s SPF record, count DNS lookup mechanisms, and read the final qualifier.
SPF generator
Build a formatted SPF record from your IPs, include: domains and policy qualifier.
DMARC lookup
Read any domain’s DMARC enforcement policy, alignment modes, and reporting addresses.
DMARC generator
Build a DMARC record from your policy, subdomain settings, and reporting setup.
MX lookup
Resolve mail server hostnames and priority order for any domain.
DNS lookup
Query A, AAAA, MX, TXT, CNAME, NS, SOA and other DNS record types for any hostname.
Sender score lookup
Check any mail-server IP’s reputation on the SenderScore index — 0–100 score, rating and 30-day trend.
DNS security check
Grade DNSSEC, DANE, CAA records, registry lock and 9 other DNS security controls — A–F with prioritised recommendations.
Blacklist & security
One-off checks for domain and IP blacklist status.Domain blacklist check
Scan your sending domain against 17 major DNS blacklists and get a per-blacklist verdict.
IP blacklist check
Check any IPv4 or IPv6 against 69 major email DNSBLs and get a per-blacklist verdict.
Malicious URL lookup
Check any URL against threat intelligence feeds for phishing, malware and other harmful content.
URL verifier
Verify any HTTPS URL is live and reachable before including it in a campaign or ad.
TCP port checker
Test whether any TCP port is open and reachable on a domain or IP — useful for SMTP, firewall, and service checks.
Content analysis
Tools that score and analyse email content before you send.Email subject line scorer
Score any subject line across 14 criteria — spam words, readability, length and sentiment.
Email subject line suggester
Generate 3–10 AI subject line alternatives from any draft — ready to score and A/B test.
Readability scorer
Check reading ease, grade level and reading time across seven formulas for any body of text.
Sentiment analysis
Score any text for emotional tone using AFINN word weighting — see positive, neutral and negative signals word by word.
Blacklist monitoring
Continuous monitoring for sending IPs and domains against real-time blacklists.Overview
What the tool watches, how it alerts, and how groups work.
Setup
Add IPs, add domains, pick a check cadence, configure alerts.
IPs
Manage monitored IPs, view per-IP history, run on-demand checks.
Domains
Manage monitored domains and inspect domain-blacklist results.
Groups
Group resources by client, brand, or product line for routed alerts.
Bulk import
Add many IPs or domains at once via CSV.
Alerts
Configure email and webhook notifications for new listings.
Troubleshoot
Common issues, false positives, and how to interpret historical patterns.
SMTP testing
Tools for testing SMTP server connectivity and sending a real test message.SMTP server test
Check any hostname or IP for SMTP connectivity, banner and STARTTLS support — no email sent.
SMTP email test
Send a real test message through your SMTP server to verify credentials, TLS and delivery end-to-end.
Data generation
Tools that generate synthetic test data — names, contacts, dates and more — for development, testing and prototyping without using production records.Person data generator
Create localised person profiles with optional job, biography and personal fields for tests and prototypes.
Contact data generator
Generate synthetic email, website, phone, account and social fields for CRM tests and API integration.
Name generator
Generate synthetic name fixtures with locale, gender, type and seed controls.
Date generator
Generate ISO dates, month names, weekdays and time-zone identifiers with range, locale and seed controls.
Phone data generator
Generate phone number and IMEI fixtures with locale, style, method and seed controls.
Company data generator
Generate company names, catch phrases and business vocabulary for CRM tests and prototypes.
Commerce data generator
Generate product, price, department and ISBN fixtures for ecommerce tests and catalogues.
Finance data generator
Generate account, card, currency, IBAN and payment fixtures for tests.
Food data generator
Generate dish, cuisine, ingredient and menu fixtures for tests.
Git data generator
Generate branch, commit, SHA and log-entry fixtures for parser tests.
Animal data generator
Generate animal species, breed and pet-name fixtures for tests.
Book data generator
Generate title, author, genre and publisher fixtures for tests.
Vehicle data generator
Generate vehicle, VIN and registration fixtures for test datasets.
Dev fixture generator
Generate file, MIME, cron, interface and semver fixtures for parser tests.
Colour generator
Generate RGB, HSL, CMYK and CSS colour fixtures for design-system QA.
Lorem ipsum generator
Generate words, paragraphs, slugs and lines for layout and CMS fixtures.
Word data generator
Generate adjectives, nouns, verbs and word-list fixtures for search and taxonomy tests.
Random string generator
Generate UUID, ULID, Nano ID and custom string fixtures for validation tests.
Random number generator
Generate integer, float, BigInt and base-number fixtures for parser tests.
Airline data generator
Generate airline, airport, flight and booking fixtures for travel QA.
Database data generator
Generate column, engine, ObjectId and type fixtures for schema tests.
Boolean generator
Generate true or false fixtures for flags, toggles and validators.
Tech jargon generator
Generate technical jargon, abbreviations, adjectives, nouns and verbs as a lorem-ipsum-alternative.
Placeholder image generator
Generate placeholder image URLs and SVG data URIs for prototypes, avatars and design-system fixtures.
Music data generator
Generate album, artist, genre and song name fixtures for music app prototypes and catalog screens.
Science data generator
Generate chemical element and SI unit fixtures for chemistry quizzes, learning content and conversion tests.
Location data generator
Generate address, city, country, GPS coordinate and zip code fixtures for maps, geo apps and location-aware tests.
Internet data generator
Generate email, IP, domain, JWT, MAC, password and user agent fixtures for API tests, mock services and demos.
Other tools
Phone number validator
Check any phone number for E.164 format, identify the country code and get the normalised international number.
Sendmux integration
The companion tool for Spotzee customers running their own SMTP relay.Overview
What Sendmux does and how it integrates with the rest of Spotzee.
Logs
Inspect message-level delivery, bounce, and rejection logs.