Cold Email Tools
Everything you need to set up, monitor, and optimize your cold email infrastructure — built by the team behind coldBirds.
Most Popular
Our highest-traffic tools — used by thousands of cold email professionals every month.
Sending Limits
Look up email sending limits for every major provider — Google Workspace, Microsoft 365, Outlook, Zoho and more.
Use ToolSubject Line Analyzer
Analyze your email subject lines for spam triggers, length, personalization, and get a deliverability-safe score.
Use ToolDNS Record Generator
Generate copy-paste DNS records (SPF, DKIM, DMARC) for your email provider with step-by-step instructions.
Use ToolMailbox Calculator
Calculate exactly how many mailboxes and domains you need to hit your cold email targets.
Use ToolROI Calculator
Calculate your cold email ROI — cost per meeting, cost per reply, monthly returns and payback period.
Use ToolDomain Health
Get an instant health score for any email domain — SPF, DKIM, DMARC, MX records, and blacklist status.
Use ToolDeliverabilityTools
Domain Health
Get an instant health score for any email domain — SPF, DKIM, DMARC, MX records, and blacklist status.
Use ToolBlacklist Checker
Check your domain or IP against 100+ email blacklists with delisting instructions.
Use ToolReputation Lookup
Check your domain and IP reputation across Google Postmaster, Microsoft SNDS, SenderScore, and more.
Use ToolInbox Placement
Test where your emails actually land — Primary inbox, Promotions, Spam, or Not delivered — across major providers.
Use ToolDMARC Analyzer
Upload a DMARC XML report and visualize pass/fail rates, unauthorized senders, and alignment issues.
Use ToolDeliverability Score
Get a single 0–100 deliverability score for your domain combining DNS, authentication, blacklists, and reputation.
Use ToolInfrastructureTools
Sending Limits
Look up email sending limits for every major provider — Google Workspace, Microsoft 365, Outlook, Zoho and more.
Use ToolDNS Record Generator
Generate copy-paste DNS records (SPF, DKIM, DMARC) for your email provider with step-by-step instructions.
Use ToolWarmup Planner
Generate a day-by-day warmup schedule for your new mailboxes with safe-to-send dates and volume ramps.
Use ToolCalculatorTools
Mailbox Calculator
Calculate exactly how many mailboxes and domains you need to hit your cold email targets.
Use ToolROI Calculator
Calculate your cold email ROI — cost per meeting, cost per reply, monthly returns and payback period.
Use ToolCost Comparison
Compare cold email infrastructure costs across providers — including hidden costs most vendors don't mention.
Use ToolAgency Profit
Calculate your agency's per-client profit margins and see how infrastructure costs impact your bottom line.
Use ToolCapacity Planner
Reverse-engineer from your revenue target to the exact mailboxes, SDRs, and budget needed to get there.
Use ToolAnalysisTools
Subject Line Analyzer
Analyze your email subject lines for spam triggers, length, personalization, and get a deliverability-safe score.
Use ToolHeader Analyzer
Decode email headers into a human-readable analysis — authentication, routing, delays, and spam indicators.
Use ToolEmail Grader
Grade your cold email on personalization, readability, CTA clarity, and spam risk with actionable fixes.
Use ToolComplianceTools
Compliance Check
Check your cold email against CAN-SPAM, GDPR, and CASL compliance rules with fix suggestions.
Use ToolSecurity Comparison
Compare cold email vendors on security and compliance — SOC2, GDPR, DPA, encryption, SLA, and more.
Use ToolGDPR Checker
Check if your cold email outreach is GDPR-compliant with a guided questionnaire and per-article assessment.
Use ToolThese tools diagnose. coldBirds prevents.
Isolated mailboxes, dedicated IPs, auto DNS, 6-hour health monitoring, and a free dedicated VA. Start with 20 free mailboxes — no credit card required.
Claim 20 Free Mailboxes →