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Zero-Downtime Migration

Switch to InboxCore without missing a single message.

Our migration process keeps your old email active until the very last step. No downtime, no lost emails, no stress.

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Zero Downtime

Your old email works until the very last step — no missed messages during migration.

Complete Data Transfer

All emails, folders, contacts, and calendar entries are migrated.

Assisted Migration

Our team can guide you through DNS changes and verify everything works.

Provider Compatibility

Migrate from any provider.

Provider
Difficulty
Est. Time
Notes
Gmail / Google Workspace
Easy
1-2 hours
IMAP export available
Microsoft 365 / Outlook
Easy
1-2 hours
Full IMAP support
Yahoo Mail
Easy
1 hour
IMAP enabled by default
Zoho Mail
Easy
1 hour
Straightforward migration
GoDaddy / cPanel Email
Medium
2-3 hours
May need DNS assistance
Custom Mail Servers
Medium
2-4 hours
Contact us for guidance
Zero-Downtime Process

Your step-by-step migration plan.

Unlike traditional migrations, our process keeps your current email working until everything is verified.

STEP 01

Sign Up for InboxCore

Create your InboxCore account and select your plan. Your new mailbox will be ready within minutes. No domain changes yet — your old email continues working normally.

Keep your old email service active during migration
STEP 02

Import Your Existing Emails

Transfer all your existing emails, folders, and contacts to InboxCore using IMAP sync. This runs in the background while your old service remains fully operational.

Migration happens alongside your active email — no interruption
STEP 03

Test & Verify Everything

Configure your email clients (Outlook, Apple Mail, mobile) and verify all emails synced correctly. Send test messages between accounts to ensure delivery works.

Both email systems work simultaneously during this phase
STEP 04

Update DNS Records

Once verified, update your domain's MX, SPF, and DKIM records to point to InboxCore. DNS changes propagate within 1-24 hours. New emails start arriving at InboxCore.

Critical: Only change DNS after migration is verified
STEP 05

Disconnect Old Provider

After confirming all new mail arrives at InboxCore and DNS has fully propagated, you can safely cancel your old email service. We recommend keeping it active for 48-72 hours as backup.

Zero downtime — old service worked until the switch was complete

Important for Custom Domain Users

If you're using a custom domain with your current mail server (not Gmail/Yahoo/etc), your MX records are already pointing to your old provider. This means we must complete the migration before changing DNS — otherwise new emails would arrive at InboxCore before your old emails are transferred.

Our process handles this correctly: we copy your existing emails first, verify everything, then update DNS. This ensures zero message loss regardless of your current setup.

Quick Reference

Server settings for your clients.

Incoming (IMAP)

Server: mail.inboxcore.xyz
Port: 993
Security: SSL/TLS

Outgoing (SMTP)

Server: mail.inboxcore.xyz
Port: 587
Security: STARTTLS
Full Settings Reference

Ready to migrate?

Our support team is ready to guide you through a seamless migration.

Start MigrationRequest Assisted Migration