Tool guideDNS & Domains
Nslookup – Complete Guide to DNS Record Lookups
What a DNS lookup really asks, how to query A, AAAA, CNAME, MX, NS, TXT, SOA, CAA and SRV records online, and how to read NXDOMAIN, empty answers and TTLs.
Tagged “mx record”
Technical guides for every NetTools.tech tool — what it does, how it works, how to read the results and how to troubleshoot — plus articles for system administrators, DevOps engineers and security professionals.
Tool guideEmail Tools
MX Lookup – Complete Guide to MX Records and Mail Routing
What MX records are, how sending servers use them, how to read the NetTools.tech MX lookup (priority, addresses, reverse DNS, null MX) and how to troubleshoot mail routing.
Category guideEmail Tools
Email Tools – Complete Guide to Diagnosing Mail Delivery and Email Authentication
An overview of the NetTools.tech email tools: mail routing and SMTP diagnostics, SPF, DKIM and DMARC lookups and generators, blocklist checks, transport security and bulk checks, with a problem-to-tool map and workflows.