37.com
This is a public email provider, a free email service that anyone can sign up for, like Gmail or Yahoo.
While not inherently problematic, public email addresses may indicate personal rather than professional use, and can sometimes be associated with lower-value users in B2B contexts.
Domain Classification
Domain can receive emails and has proper infrastructure
Temporary email service designed for short-term use
Free email service like Gmail, Yahoo, or Hotmail
Appears on public blocklists for abusive activity
Educational institution or university domain
Technical Information
🌐 DNS Configuration
Mail Exchange records for email delivery
Address records that point domain to an IP address
This domain has no A records, meaning it doesn't point to any web server. This increases the likelihood that the domain is invalid or no longer maintained.
Similar Domains
These domains share similar patterns or characteristics with 37.com.
Why This Domain Analysis Matters for Your Business
Understanding email domain characteristics helps you make smarter decisions about user registrations, protect your platform from abuse, and improve the overall quality of your user base.
Disposable Email Domains
These are temporary email services designed to be discarded after short-term use. Think "10-minute email" or "throwaway email" services.
Public Email Providers
Free email services like Gmail, Yahoo, Hotmail, and similar providers that anyone can sign up for without verification.
Known Spam Domains
Domains that appear on public blocklists for sending spam, phishing attempts, or other abusive email activity.
Academic Institutions
Email domains belonging to universities, colleges, and other educational institutions, often ending in .edu or similar.
📋 Technical Infrastructure Checks
How to Use This Information
✅ For SaaS Free Trials
Block disposable and spam domains to ensure your free trials reach genuine prospects who might convert to paid users. Allow public providers but consider additional verification for high-value trials.
🏢 For B2B Applications
Prioritize corporate domains over public email providers. Consider requiring business verification for users with Gmail, Yahoo, or other personal email addresses when targeting enterprise customers.
🎓 For Educational Pricing
Automatically offer student discounts to users with academic domain emails. This saves manual verification time while ensuring legitimate educational users get appropriate pricing.
📊 For User Segmentation
Use domain types to segment your marketing campaigns. Professional domains might receive B2B-focused content, while public email users get more consumer-oriented messaging.
Understanding Domain Risk Levels
High Risk
Consider blocking or requiring additional verification
Medium Risk
Monitor closely and apply context-specific rules
Low Risk
Generally safe to accept with standard processes
Test Other Domains
Test More Domains
Use our domain checker to analyze other email addresses from your signup data. Understanding patterns in your user base helps you make better decisions about verification and onboarding processes.
Check Another DomainFrequently Asked Questions
Are public email providers bad for business?
Not necessarily. Public email providers like Gmail are used by millions of legitimate users. However, in B2B contexts, corporate email addresses often indicate higher-value prospects and more serious business intent.
How should I handle public email signups differently?
Consider your audience and goals. For B2B products, you might require additional business verification. For consumer products, public emails are perfectly normal and shouldn't be treated differently.
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