Catch Broken Email DNS Before Your Client Hears “Your Messages Are Bouncing”
A potential customer emails your client's sales address. Seconds later the message comes back: address not found , mailbox unavailable , or domain could not be reached . That customer sees the failure first. They tell your client. Your client calls you. By then nobody knows how many enquiries were lost, and a small DNS problem has become an embarrassing business problem. Exchange can be healthy.…
When a potential customer emails your client's sales address, the message fails and returns an error. The customer first notices this issue and informs your client. This problem can escalate as nobody is aware of how many inquiries were lost. The Exchange mail server can be functioning correctly, and all internal dashboards might appear green.
However, if the public MX, SPF, DKIM, or DMARC records are missing or incorrect, customers still encounter the failure. A homepage uptime check will never detect this issue since websites and email share a domain name and have few similarities. The website relies on an A, AAAA, or CNAME record, while email depends on four distinct DNS records that ordinary website checks do not cover.
Monitoring these four public records from the outside can help an MSP, agency, or developer alert your client before their customers become the monitoring system. To perform this monitoring, focus on the MX, SPF, DKIM, and DMARC records. Each one can break in different ways, but running dig commands to check these records can serve as a basic monitoring system.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
