MailArrive
Email checkup Toolbox Account

The toolbox

Every lookup in one place — pick a tool or type a command like mx:yourdomain.com. Plain-English verdicts, copyable results, no ads, no login.

Pro move: type dmarc:yourdomain.com or blacklist:1.2.3.4 straight into the box — it switches tools for you.

DNS
MX Lookup
Which servers receive this domain's email
A Record
IPv4 address for a hostname
AAAA Record
IPv6 address for a hostname
CNAME Lookup
What a hostname is an alias for
TXT Records
All text records, decoded
NS Lookup
Who answers DNS for this domain
Reverse DNS (PTR)
Hostname behind an IP address
SOA Record
Zone authority & serial number
DNS Health
Quick sanity check of the whole zone
Email authentication
SPF Check
Who's allowed to send as your domain
DKIM Check
Digital signatures on your outgoing mail
DMARC Check
Your anti-spoofing policy, decoded
BIMI Check
Your logo in the inbox
MTA-STS Check
Enforced encryption for inbound mail
TLS-RPT Check
Reports when mail encryption fails
Reputation
Blacklist Check
Are you on a spam blocklist?
Domain & IP
Domain Whois
Registration, expiry & registrar
IP Whois (ARIN/RIR)
Who owns an IP block
ASN Lookup
The network behind an IP
Network
HTTP Check
Does plain HTTP respond & where does it go
HTTPS Check
TLS reachability, redirects & security headers
TCP Port Test
Is a port open, and how fast
SMTP Test
Talk to a mail server & read its banner
Latency Test
Round-trip time from our edge
Network Path
Where a host lives on the network