Free fast, advanced and comprehensive web-based DNS and domain name tools for DNS hosting, going beyond just ping, tracert/traceroute, WHOIS and DNS lookups. 30+ Powerful Tools & Alerts.

At first the tools appear hidden, to see the tools clikc on either 'Professionial Toolset', 'Mail Server Test Center', 'Domain Doctor' or 'RBalerts'  just below the main menu.

Registration is requiredfor running more than 3 or 4 of the tests within a period.. DNSstuff has implemented an extended free account. The free account offers unlimited access to our Professional Toolset. The extended free account is available to current and new DNSstuff customers.

There are lots of emails tools here:

• DKIM Key Checker - How do I lookup and verify a DKIM TXT record?
• Sender Policy Framework (SPF) - Is my domain using a valid SPF record?
• Email Test - Do I have a problem sending email to a user or domain?
• Spam Blacklist Lookup - Is my server in a spam database?
• Email Path Analyzer - Is this email legitimate?
• SMTP Banner - Is my banner RFC-compliant?
• SMTP Greeting - Is my greeting message RFC-compliant?
• Null Sender - Does my mail server accept a null sender?
• Postmaster - Does my mail server accept emails addressed to postmaster @ mydomain?
• SMTP Abuse - Does my mail server prevent abuse?
• Address Literal - Does my mail server accept incoming emails addressed to my IP address?
• Open Relay - Is my mail server configured as an open mail relay?
• POP Banner - How do I check POP server for Banner?
• POP Authorization - How do I check no. of mails in the mailbox?
• POP Status - How do I check the status of the POP mailbox?
• IMAP Banner - How do I check IMAP server for Banner?
• IMAP Authorization - How do I check no. of mails in the mailbox?
• IMAP Status - How do I check the status of the POP mailbox?

DKIM Key Checker - How do I lookup and verify a DKIM TXT record?
Sender Policy Framework (SPF) - Is my domain using a valid SPF record?
Email Test - Do I have a problem sending email to a user or domain?
Spam Blacklist Lookup - Is my server in a spam database?
Email Path Analyzer - Is this email legitimate?
SMTP Banner - Is my banner RFC-compliant?
SMTP Greeting - Is my greeting message RFC-compliant?
Null Sender - Does my mail server accept a null sender?
Postmaster - Does my mail server accept emails addressed to postmaster@mydomain?
SMTP Abuse - Does my&