Diagnose email problems before changing settings.
Use XMLA diagnostics to separate DNS, authentication, mailbox, routing, blacklist, password, and device issues before making changes that can make delivery harder to trace.
What To Check
Email failures usually come from one of four layers.
The right fix depends on whether the problem is DNS, authentication, mailbox access, or reputation.
LayerDNS Route
Confirm the domain points mail to the right mail exchangers and does not have stale routing records.
LayerAuthentication
Review SPF, DKIM, and DMARC signals that affect whether other providers trust your messages.
LayerMailbox Access
Separate wrong password, blocked login, IMAP, SMTP, and saved-device credential issues.
LayerReputation
Check blacklist and delivery signals that can explain spam folder or rejected-message behavior.
Symptoms
Start with what users actually experience.
A clear symptom helps XMLA move faster from report output to the specific record, setting, password, or mailbox issue.
SMTPCannot send
SMTP server, port, authentication, saved password, IP block, or provider throttling may be involved.
MXCannot receive
MX records, mailbox quota, routing, forwarding, filters, or domain status may be involved.
TrustGoing to spam
SPF, DKIM, DMARC, message quality, domain reputation, or blacklist signals may be involved.
SyncDevice mismatch
One device may have stale settings while webmail or another client still works correctly.
Diagnostic Tool
Run a domain-level email diagnostic report.
Enter an email address to test mail routing, authentication, DNS, and reputation signals. Use the exported report when opening a support request.
Email Diagnostics & Troubleshooting
Professional domain-level diagnostics for email configuration
Process
Use the report to make fewer, better changes.
Email troubleshooting is faster when each change is tied to a measured signal and then verified afterward.
Run diagnostics
Start with the email address or domain-level diagnostic check to collect technical signals.
Compare symptoms
Identify whether the issue is sending, receiving, spam placement, login, or device sync.
Fix the source
Adjust DNS records, mail settings, passwords, routing, quota, or account configuration.
Verify delivery
Send, receive, sync, and review report output before assuming the issue is closed.
Related Help
Email support connects to setup, accounts, passwords, and DNS.
If the diagnostic report points to a service area, use the route that matches the actual fix.
Setup Email
Use the configuration guide for IMAP, SMTP, SSL/TLS, ports, and device setup.
NewNew Email Account
Request a new mailbox, forwarder, storage allocation, or setup delivery details.
AccessPassword Reset
Reset a mailbox or account password when access is the blocker.
DNSDNS + Domains
Review MX, SPF, DKIM, DMARC, domain routing, and registrar-level email dependencies.
Need Human Review?
Send XMLA the report and the exact symptom.
Include whether the problem is sending, receiving, spam placement, login, bouncebacks, or one-device-only behavior so support can focus on the right layer.
