Free tools

Check your email, your DNS and your domain.

The same checks we use in support, open to anyone: no sign-up, read live from your domain's servers and with the fix for each problem explained.

9 tools

for email, DNS, domains and certificates

Live

from your DNS servers, with no caches in between

No record

or a contact email: you type the domain and you're done

With the fix

for every warning, the way support would tell you

Email

Get your email into the inbox.

Send a message and we'll tell you what the receiving server sees, or check each authentication record and your IP's reputation separately.

Mail tester

Email test

Send a message and see whether it reaches the inbox: authentication, reputation, content and a score from 0 to 10.

Analysing a message

received 2 s ago

Your Shop <hola@tudominio.es>

Your order #1042 has shipped

  • SPF 203.0.113.10 authorised pass
  • DKIM d=tudominio.es · 2048 bits pass
  • DMARC aligned with the From pass
  • Lists on no lists clean
  • SpamAssassin 0,8 points −0,5
  • Format no one-click unsubscribe −0,3

10

Noteout of 10

to the inbox

SPF

SPF checker

Who can send email with your domain, and whether you go over the ten lookups.

Evaluating the SPF

tudominio.com

  • include:_spf.google.com

    Google Workspace

    +4

  • include:spf.protection.outlook.com

    Microsoft 365

    +2

  • include:servers.mcsv.net

    Mailchimp

    +1

  • mx

    your servers

    +1
DNS queries 0 / 10
8 of 10 · within the limit, SPF passes

DKIM

DKIM checker

Finds the key you sign your email with, measures its bits and tells you whether it's revoked or in testing.

Checking the signature

Google Workspace

DKIM-Signature: v=1; a=rsa-sha256;

d=tudominio.com; s=google;

bh=2jUSOH9NhtVGCQ…; b=dzdVyOfAKCdLXdJO…

google._domainkey.tudominio.com

TXT ?

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0B…

the public key, in your DNS

2048 bits
dkim=pass · the signature matches the key

DMARC

DMARC checker

Which policy you ask for, where the reports go and what the next step towards reject is.

A fake email

from 192.0.2.77

From: facturas@tudominio.com

SPF fail DKIM fail DMARC fail
p=none p=quarantine p=reject
Inbox
Spam
Rejected
It reaches the inbox as if it were yours

Blacklists

Blacklist checker

Whether the IP sending your email is on Spamhaus, Barracuda or other lists, and how to get off them.

Asking the lists

203.0.113.10
A? 10.113.0.203.zen.spamhaus.org

  • Spamhaus ZEN

    zen.spamhaus.org

    doesn't exist

    clean

  • Barracuda

    b.barracudacentral.org

    doesn't exist

    clean

  • SpamCop

    bl.spamcop.net

    127.0.0.2

    listed

  • Mailspike

    bl.mailspike.net

    doesn't exist

    clean

1 of 4 · SpamCop has it on its list

DNS, domains and web

What the internet sees of your domain.

Whether a DNS change has reached everywhere, which records a domain publishes, who owns it and whether its certificate is in order.

DNS propagation

DNS propagation

Whether your DNS change is already visible around the world, and how long each old copy has left.

Copies expire

A · TTL 1 h
Your DNS servers 203.0.113.20
  • Google 198.51.100.7 203.0.113.20 13 min renewed
  • Cloudflare 198.51.100.7 203.0.113.20 1 min renewed
  • Quad9 198.51.100.7 203.0.113.20 35 min renewed
  • OpenDNS 198.51.100.7 203.0.113.20 23 min renewed
  • DNS4EU 198.51.100.7 203.0.113.20 48 min renewed
  • AliDNS 198.51.100.7 203.0.113.20 57 min renewed
1 of 6 with the new IP

DNS

DNS lookup

The A, MX, TXT or NS records of any name, queried from each of its DNS servers.

Asking each server

MX

tudominio.com

  • ns1.theservercluster.com

    10 mail.tudominio.com

    12 ms

  • ns2.theservercluster.com

    10 mail.tudominio.com

    18 ms

  • ns3.theservercluster.com

    10 mail.tudominio.com 10 mx.proveedor-anterior.com

    25 ms
3 of 3 match · zone up to date
2 of 3 match · ns3 is lagging behind

Whois

Domain WHOIS

Who owns a domain, when it expires, whether it can be transferred or whether it's free to register.

Asking the registry

RDAP · .com

tudominio.com

Registrar
Openprovider
Created
21 May 2014
Status
transfer lock
DNS
ns1.theservercluster.com
renewed today expires
Expires in 9 months · 24 Jul 2027

SSL

SSL checker

Which names your certificate covers, who signs it and how many days it has left.

Before the padlock

tudominio.com:443

  • The name

    tudominio.com · www.tudominio.com

  • The dates

    61 days left

  • The chain

    YR1 → Root YR → ISRG Root X1

Secure connection · TLS 1.3

And if what's failing is yours, we'll fix it for you.

At Hostsuar the panel checks each domain's email, DNS and certificates and warns you before you notice. If you're coming from another provider, we handle the migration.
See hosting plans Contact