SPF Record Checker
Validate your domain's SPF record and identify misconfigurations that block email delivery
DKIM Record Checker
Verify your DKIM DNS record is correctly published and properly signing outgoing emails
DMARC Record Checker
Analyze your DMARC policy to ensure email authentication alignment and reporting is active
Email Authentication Analyzer
Run a full SPF + DKIM + DMARC audit on any domain and get a pass/fail scorecard
Email Blacklist Checker
Check if your IP or domain appears on 100+ email blacklists and spam databases
IP Reputation Checker
Look up the sender reputation score for any IP address across major email providers
Sender Score Lookup
Check your email sending IP's sender score (0-100) and compare against industry benchmarks
Inbox Placement Tester
Test whether your emails land in inbox, spam, or promotions tab across Gmail, Outlook, and Yahoo
Email Warm-Up Calculator
Calculate the optimal warm-up schedule for new email accounts based on daily send volume targets
Deliverability Score Checker
Get a composite deliverability score for your domain combining authentication, reputation, and blacklist status
Email Bounce Rate Calculator
Calculate your hard and soft bounce rates and benchmark against industry averages by niche
Spam Score Checker
Paste your email content and get a spam probability score with flagged trigger words
Email Header Analyzer
Parse raw email headers to trace delivery path, authentication results, and latency
MX Record Lookup
Look up MX records for any domain to verify mail server configuration and priority settings
Reverse DNS Lookup
Perform a reverse DNS (PTR) lookup on any IP to verify it resolves to your sending domain
PTR Record Checker
Verify your mail server's PTR record matches your sending domain for proper reverse DNS
SMTP Server Tester
Test SMTP connectivity by sending a test message and verifying handshake, TLS, and authentication
Email Port Checker
Check if email ports 25, 465, and 587 are open and accepting connections on your mail server
TLS Encryption Checker
Verify your mail server supports TLS encryption and check which TLS versions are enabled
Email Routing Analyzer
Trace the delivery route of an email from sender to recipient and identify routing bottlenecks
BIMI Record Checker
Validate your BIMI DNS record and verify your brand logo will display in recipient inboxes
ARC Record Checker
Check Authenticated Received Chain (ARC) headers to verify forwarded email authentication
Email Forwarding Tester
Test if email forwarding preserves SPF/DKIM/DMARC authentication through intermediary servers
Mail Server Tester
Run a comprehensive health check on any mail server including connectivity, DNS, and auth
DNS Propagation Checker
Check if your DNS changes (SPF, DKIM, MX) have propagated across global nameservers
Automate Your Email Deliverability & Authentication
These free tools are great for quick checks. FirstSales automates your entireemail deliverability & authentication workflow with AI-powered personalization.
FAQ
Frequently Asked Questions
Learn how Firstsales protects your domain, lands emails in inboxes, and turns cold outreach into revenue—everything in one place.
Yes, 100% free. All tools in this category work without signup, email capture, or payment. We provide these free tools to demonstrate expertise and help sales teams succeed.
Our tools check live data and query relevant services in real-time. Results are accurate at the time of checking, but remember that some metrics and statuses can change frequently.
Yes, all tools are free to use for both personal and commercial purposes. Sales teams, agencies, and businesses worldwide use our tools daily.
No account required. Simply navigate to any tool and start using it immediately. For advanced features and team management, consider creating a free FirstSales account.
