إصلاح تواريخ النسخ اليدوي عبر IMAP في Gmail

Manual IMAP copy to Gmail involves adding both a source IMAP account and the Gmail account to an عميل البريد الإلكتروني (Outlook, Thunderbird, or Apple Mail) and copying messages between them. When the عميل البريد الإلكتروني uploads messages to Gmail via IMAP APPEND, Gmail records the upload timestamp as the message's INTERNALDATE. The عميل البريد الإلكتروني does not pass the original INTERNALDATE from الخادم المصدر because most clients do not support this during copy operations.

Gmail's IMAP handling introduces an additional complication. Gmail processes uploaded messages through its own pipeline, adding a رأس Received that contains the Gmail IMAP gateway timestamp. This رأس Received becomes the topmost entry in the header chain. While Gmail's واجهة الويب uses the رأس Date for display (potentially showing التاريخ الصحيحs), every IMAP client that subsequently connects to the Gmail account reads the corrupted INTERNALDATE.

Users who manually copy emails to Gmail often do so when consolidating multiple email accounts or when moving from a less common email provider that is not supported by standard migration tools. The simplicity of drag-and-drop in an عميل البريد الإلكتروني masks the underlying تلف التاريخ that occurs at the IMAP protocol level. The problem becomes apparent when the المستخدم checks their Gmail account from a different client or when an IMAP-connected نسخة احتياطية tool archives the التاريخ الخاطئs.

In Gmail, the impact follows the familiar split: the واجهة الويب may show التاريخ الصحيحs (from the رأس Date) while IMAP clients show the copy date (from the INTERNALDATE). Users who access Gmail only through the web browser may not notice the issue. Users who use Outlook, Apple Mail, or Thunderbird connected to Gmail via IMAP see the copy date for all manually transferred messages.

Gmail's label system preserves the labels applied during the copy, but the sorting within labels uses the INTERNALDATE when accessed via IMAP. IMAP clients that sort by server date display the copied messages out of their original chronological order. Google Takeout exports and third-party نسخة احتياطية tools record the copy date as the message date, creating permanent inaccuracies in exported archives. For المستخدمين who manually consolidated years of email from multiple accounts into Gmail, the تلف التاريخ can affect a significant portion of their entire email history.