Fix BitTitan Migration Dates in Outlook
Why BitTitan Migrations Show the Wrong Date in Outlook
BitTitan MigrationWiz is one of the most popular tools for migrating mailboxes between platforms. During migration, MigrationWiz downloads each email from the source server and re-uploads it to the destination using IMAP APPEND. This process causes the destination mail server to stamp a new "Received" header on every message, dated to the moment of migration rather than the original delivery date.
Outlook determines the date shown in the inbox by reading the topmost "Received" header in each email. Because MigrationWiz's migration header sits at the top of the header chain, Outlook displays the migration date for every single message. A mailbox spanning years of correspondence suddenly appears as though every email arrived on the same day.
This behavior is particularly disruptive in corporate environments where MigrationWiz is used to move hundreds or thousands of mailboxes at once. Every user opens Outlook the next morning and finds their inbox, sent items, and archive folders all stamped with the migration date. Date-based sorting, searching, and compliance workflows break immediately.
How This Affects Outlook
Outlook desktop and Outlook for Windows both rely on the IMAP INTERNALDATE and the topmost Received header to populate the "Received" column. After a BitTitan migration, every email in every folder displays the migration timestamp in this column. Sorting by date groups the entire mailbox into a single day, making it impossible to locate emails chronologically.
Outlook's search functionality is also impacted. Filtering by date range returns incorrect results because the indexed date reflects the migration, not the original delivery. Users who depend on Outlook rules that trigger based on received date find those rules misfire or fail entirely. Calendar-linked email threads lose their temporal context, and conversation view becomes unreliable when all messages share an identical received timestamp.
Frequently Asked Questions
Does BitTitan MigrationWiz always change email dates?
Yes. Every time MigrationWiz transfers an email via IMAP APPEND, the destination server adds a new Received header with the current timestamp. This is inherent to how the IMAP protocol works and affects all MigrationWiz migrations regardless of source or destination platform.
Can I fix BitTitan date issues in Outlook without re-migrating?
Yes. Redate.io connects to the mailbox, strips the migration Received header from each affected email, and re-inserts the message with the correct INTERNALDATE. The original email is preserved as a backup. No re-migration is needed.
How many emails can Redate.io fix after a BitTitan migration?
Redate.io offers plans from 1,000 to 100,000 emails per mailbox. For large corporate migrations done with BitTitan, the Enterprise plan covers up to 100,000 emails at a fixed price.
Will fixing dates in Outlook affect my emails in other clients?
The fix corrects the email at the server level. Once Redate.io removes the migration Received header and resets the INTERNALDATE, the correct date appears in Outlook, OWA, mobile clients, and any other application that connects to the mailbox.