Check a domain or IP against 10 major spam blacklists
Generate professional HTML email signatures for Gmail and Outlook
Check email format, mail servers, disposable providers and role accounts
Test a domain's SPF, DKIM and DMARC email authentication records
Test an email subject line and body for spam-trigger words
Generate a ready-to-use mailto: link with To, CC, BCC, subject and body
Pull every valid, deduplicated email address out of any pasted text or HTML