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Business Services (UK)

Email Recovery After a cPanel/WHM Server Migration

A UK business's email broke completely after a hosting migration — nothing in or out of Outlook and messages to Yahoo bouncing. Diagnosed and fixed at the root across WHM/cPanel, Exim, DNS and SSL, with delivery restored to Gmail, Yahoo and Outlook and proven with live tests.

No calls — just a simple email exchange to see if it fits.

Business Services (UK)

UK-Based Support & Operations
Fits Around Existing Workflows
UK GDPR-Aligned Data Practices
  • Email Recovery After a cPanel/WHM Server Migration — Business Services (UK)

The business situation

After a hosting migration, the business could barely use its email. Nothing was leaving or entering Outlook, and messages to and from Yahoo were bouncing. A previous freelancer had got stuck on an "Exim error" they could not resolve.

What Servadra delivered

We began with a full read-only diagnosis before changing a single setting — Exim logs and mail queue, mail routing, DNS (MX/SPF/DKIM/DMARC/PTR), SSL and every mailbox. The migration had left the server still identifying itself under the old server's name in both its mail HELO and its reverse DNS (PTR), so strict providers such as Yahoo rejected every message with "550 Forward-confirmed reverse DNS failed", and the resulting flood of failures had tripped the hourly send-limit — silently discarding outgoing mail. We corrected the mail identity (HELO), added DMARC and verified SPF/DKIM, cleared the frozen queue and reset the send-failure limits, coordinated the reverse-DNS (PTR) correction with the VPS provider, and verified valid SSL certificates for secure Outlook connections. Every configuration was backed up first, so every change was reversible.

How the operation works

Read-only diagnosis → root-cause identification (two separate faults, correctly separated) → report before changing anything → apply server-side fixes → coordinate the provider-side reverse-DNS fix → live end-to-end verification with before/after evidence.

Key capabilities

  • WHM / cPanel server administration
  • Exim mail transport troubleshooting
  • Email deliverability (SPF, DKIM, DMARC, PTR, FCrDNS)
  • DNS configuration
  • Linux server administration
  • Outlook / IMAP / SMTP / SSL setup
  • Post-migration email recovery

Technical highlights

  • WHM / cPanel and Exim mail configuration
  • Outbound HELO corrected to a forward-confirming hostname
  • Reverse DNS (PTR) corrected to clear FCrDNS "550" rejections
  • DMARC records added, with SPF and DKIM alignment verified
  • Frozen mail queue cleared and hourly send-failure limits reset
  • Valid SSL certificates confirmed for IMAP and SMTP

Integrations

  • WHM/cPanel · Exim · DNS · SSL

Best for

  • Businesses whose email broke after a server or hosting migration
  • Companies whose mail bounces or lands in spam at Gmail, Yahoo or Outlook
  • Owners who need deliverability fixed at the root and verified, not guessed

Relevant capabilities

See the capability behind this work

Explore the parts of Servadra's delivery model demonstrated by the evidence in this case.

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No calls — just a simple email exchange to see if it fits.