PC DOS: 4096 Is Maximum Number of Inbox Entries (119088)


The information in this article applies to:

  • Microsoft Mail for PC Networks 3.0, when used with:
    • the operating system: MS-DOS
  • Microsoft Mail for PC Networks 3.0b, when used with:
    • the operating system: MS-DOS
This article was previously published under Q119088

SUMMARY

The maximum number of Inbox entries in the MS-DOS client and the Macintosh client of Microsoft Mail for PC Networks is 4096.

This limitation is due to the size of the delete bit map in the .KEY file. The .MBG file contains deleted and active mail headers. The delete flag is not maintained in the .MBG file but in the matching .KEY file. Each .KEY file contains a 512-byte bitmap of deleted headers in the corresponding .MBG file. Thus, the maximum number of messages that can be stored in the Inbox is:

512*8=4096

The Windows client and the Presentation Manager client have a limit of 5400 messages in the Inbox folder.
Modification Type:MajorLast Reviewed:10/19/2000
Keywords:KB119088
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