Fix Zoho Migration Dates in Zoho Mail

You migrated to Zoho Mail using Zoho's own Migration Wizard. The tool pulled every email from your old provider - Google Workspace, Microsoft 365, a legacy IMAP server - and uploaded it into your new Zoho account. And then every single email, from 2015 invoices to last month's project threads, showed the migration date instead of the original date.

The technical reason is straightforward enough. When Zoho Migration Wizard uploads a message, Zoho Mail's processing pipeline records the upload timestamp as the delivery date. It adds a Received header stamped with the current time. The INTERNALDATE on the server gets set to right now, not to whenever the email was originally delivered. The original Date header inside each message body still exists and still holds the correct date - but Zoho Mail does not use it for display.

What makes this situation different from other migration-date problems? With Gmail, the web interface often masks the issue by showing the Date header value. Not Zoho Mail. Zoho Mail consistently displays the delivery date from its message store across every access method: web browser, desktop app, mobile apps, IMAP clients. There is nowhere to hide from the corrupted dates. Every view, every search, every sort - all wrong.

A decade of business email history, suddenly compressed into a single day. Can you even find that contract discussion from February 2021? Not by date. Not anymore. (Unless you remember the exact subject line and hope search pulls it up.)

The damage is total. Zoho Mail's inbox view, sent mail, folder views - they all show the migration date next to every email. Date-based search queries return your entire mailbox because every message shares the same delivery date. Sorting by date produces a random-looking list since the chronological order is gone.

But it goes deeper than the inbox. Zoho Mail's Streams feature, which provides a threaded conversation view, displays incorrect chronology for discussions. Email filters and forwarding rules that reference dates operate on the corrupted timestamps. Organizations using Zoho's integrated suite - Zoho CRM, Zoho Projects, Zoho Desk - may see wrong email dates in linked records, breaking workflows that depend on accurate timelines. Redate.io addresses this through safe low-level message handling with per-message verification, connecting to Zoho Mail via IMAP to correct the date metadata on every affected email while preserving all other message properties intact.