Free Tools
The diagnostic tools we use ourselves. Free, no signup, no email gate.
Email Verifier
Check whether an email is real and deliverable. Syntax, MX, and mailbox-level probe. Useful before importing any list.
Open ToolDNS/SMTP Health Checker
Check SPF, DKIM, DMARC, MX records, and SMTP connectivity for any domain. One scan, full report.
Open ToolWebmail Finder
Paste any email address. We trace the MX records and return the exact webmail login URL. Gmail, M365, Zoho, Fastmail, and 30+ more.
Open ToolWarmupLab
Automated warmup for new sending IPs and domains. Engagement-based, ramps gradually, monitors per-ISP. Coming soon.
Stay TunedBuilt by us, used by us
Same tools we run before deploying any of our own SMTP infrastructure. Free because there's no reason to charge for them.