Use MXToolbox first if email is broken, then use IntoDNS for a quick DNS health check, and keep DNSstuff for deeper digging. That is the simple answer. MXToolbox is especially handy for mail problems because its blacklist check tests an IP against over 100 known blocklists [source: MXToolbox]. If your domain sends email, this matters a lot.

Meet the five tools

Here are the five tools we are comparing:

• MXToolbox — best for email, blacklists, and mail server checks.
• DNSstuff — best for deeper DNS and network reports.
• IntoDNS — best for fast domain health checks.
• Google Admin Toolbox Dig — best for quick raw DNS lookups.
• DNSChecker — best for checking global DNS propagation.

Think of them like a repair team. MXToolbox is the email mechanic. IntoDNS is the friendly inspector. DNSstuff is the serious engineer with a clipboard. Google Dig is the tiny pocket tool. DNSChecker is the world map with blinking dots.

1. MXToolbox: the email firefighter

MXToolbox is the tool I would open first when email gets weird.

Emails bouncing? Use MX Lookup. Messages going to spam? Check SPF, DKIM, and DMARC. Nobody getting your messages? Check blacklists. It gives quick answers without making you feel like you need three coffees and a networking degree.

Best for:

• Email delivery checks
• Blacklist checks
• MX record checks
• SPF, DKIM, and DMARC testing
• SMTP diagnostics

The annoying bit: some advanced reports push you toward paid plans. Fair enough. But when you are stressed because the CEO cannot send email, even one extra click feels rude.

Simple use case: Your domain is example.com. Customers say your order emails never arrive. MXToolbox can show if your mail server is listed on a blacklist or if your SPF record is broken.

2. DNSstuff: the heavy toolbox

DNSstuff feels more technical. That can be good. It can also feel like opening a kitchen drawer and finding six bottle openers, three corkscrews, and one mystery metal thing.

It offers DNS reports, WHOIS, IP checks, traceroutes, and mail tests. It is useful when you need detail. It is less cute than IntoDNS. It is less email-focused than MXToolbox. But it gives you plenty.

Best for:

• Technical DNS testing
• WHOIS checks
• IP and routing checks
• Mail server testing

The annoying bit: it can feel crowded. If you only want a yes-or-no answer, expect to waste time reading fields you did not ask for.

3. IntoDNS: the quick health check

IntoDNS is simple. Type a domain. Hit enter. Get a report.

That is the charm. It checks nameservers, SOA records, MX records, glue records, and common DNS issues. It uses color signals, so even non-tech people can spot trouble. Green is good. Red is bad. Yellow means “please fix me before I become a disaster.”

Best for:

• Fast DNS reports
• Nameserver checks
• Spotting setup errors
• Simple client reports

The annoying bit: the design feels old. Honestly, it feels like a tool from the era when people still burned CDs. But it works, and that counts.

4. Google Admin Toolbox Dig: the tiny sharp tool

Google Admin Toolbox Dig is not fancy. It is clean and direct. You enter a domain, choose a record type, and see the result.

Need to check an A record? Easy. Need MX records? Fine. Need TXT records for SPF or verification? No problem. Google explains the tool as a way to run DNS lookups from the browser [source: Google].

Best for:

• Quick record checks
• A, MX, TXT, CNAME, and NS lookups
• Clean results
• Simple troubleshooting

The annoying bit: it does not explain much. It gives you the data. You still need to know what the data means.

5. DNSChecker: the propagation tracker

DNSChecker answers one painful question: “Has my DNS change spread yet?”

If you changed a DNS record, results may differ around the world for a while. DNSChecker shows what different locations see. This is great after moving a website, changing email hosts, or adding a verification TXT record.

Best for:

• Global DNS propagation checks
• Website moves
• Email host changes
• Checking records from many countries

The annoying bit: it can make you impatient. You may see 18 green checks and 3 red ones. Then you sit there refreshing like it owes you money.

Simple comparison table

Tool	Best job	Use it when
MXToolbox	Email diagnostics	Mail bounces or lands in spam
DNSstuff	Deep technical checks	You need a detailed report
IntoDNS	Fast DNS health scan	You want quick red, yellow, green signals
Google Dig	Raw DNS lookup	You need one record fast
DNSChecker	Propagation checks	You changed DNS and want global status

Which one should you pick?

Pick MXToolbox if email is the problem. It is the most useful tool in this group for mail repair.

Pick IntoDNS if you want a quick domain check. It is simple and clear.

Pick DNSstuff if you need more depth. It is better for people who enjoy logs, records, and long reports. Strange people. Useful people.

Pick Google Admin Toolbox Dig when you need one clean lookup.

Pick DNSChecker when you changed DNS and need to see what the world sees.

My normal order is simple: MXToolbox for email, IntoDNS for domain health, then DNSChecker for propagation. If things still look messy, bring in DNSstuff. That combo solves most domain and email headaches without turning your afternoon into soup.