Switching email providers seems straightforward until you are actually doing it. Missing folders, silent failures, and duplicate emails are the standard experience of anyone who has tried moving accounts manually through an email client.

Here is what actually works.

Why Manual Migration Fails

Dragging folders between two open accounts in an email client is tolerable for small mailboxes. Scale it up, and the problems multiply fast. Items fail without error messages, folder structure gets lost, and running the migration a second time to catch new emails creates duplicates in the target account.

The Better Approach

The Shoviv IMAP to IMAP Migration Tool handles the entire process through a job-based workflow. You connect a source account, connect a target account, map the mailboxes, and run the job. It works across every major IMAP platform, including Gmail, Outlook, Yahoo, iCloud, Zoho, Thunderbird, and ProtonMail.

Three features make it genuinely reliable for real use. The incremental export resumes interrupted migrations from the last stopping point and prevents duplicates on repeat runs. Multiple jobs run simultaneously, which compresses large migrations significantly. Filter options let you restrict migration by date range or specific folders when you do not need everything transferred.

A free trial processes the first 50 items per folder, enough to confirm your connections are working before running the full migration.

After Migration

Verify folder counts on both sides, check the generated log report, and keep the source account active for a few weeks to catch any stragglers.