MX
The domain should have receiving mail hosts that resolve correctly in DNS.
Tool
MX and mail tester
Checks MX, SPF and DMARC records, scores business mail readiness and highlights email deliverability issues.
Business email
Mail tester: MX, SPF and DMARC in one report
The DataHouse mail tester checks MX records, SPF, DMARC and the basic DNS readiness of a mail domain. It is a quick audit for administrators and companies before mail migration or production sending.
SPF
A single coherent SPF record should include all legitimate sending services.
DMARC
DMARC should exist, have reporting and move toward a policy that protects the domain.
Common problems found by the tester
- No MX records or MX hosts without A/AAAA addresses.
- No SPF or several SPF records for the same domain.
- SPF that misses external senders such as CRM or newsletters.
- No DMARC record for the mail domain.
- DMARC without reporting or left permanently in monitoring mode.
How to use the result
The mail tester reads public DNS records only. It does not log into a mailbox and does not send a test message.
FAQ: mail tester
What does the mail tester check?
It checks MX, SPF and DMARC records, then scores basic business mail readiness and points out deliverability risks.
Does it connect to a mailbox?
No. It checks public DNS records only.