The MAPI (Messaging Application Program Interface) 1.0 allows you to send email from inside applications on your computer. If the MAPI program interface becomes corrupted, your computer will display a variety of MAPI error messages and you may not be able to send mail from Microsoft Outlook or other programs. Use the built-in "Fixmapi.exe" utility on your computer to solve the problem by replacing the core MAPI file.
Step 1
Launch the Windows search app, and then enter "Mapi32.dll" in the search field. Open the file's location folder.
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Step 2
Right-click the "Mapi32.dll" file name, and then select "Rename."
Step 3
Type "Mapi32.old" as the file name and press "Enter."
Step 4
Search for the "fixmapi.exe" file, and then select and run this file from the search results screen. There may be no visible process occurring, but the "fixmapi.exe" program will create a new "Mapi32.dll" file. If a prompt window appears, follow the instructions to fix or recreate the MAPI core file.
Step 5
Restart your computer and allow the operating system to load.
Step 6
Launch your email client and click the "Send Mail" or "Send/Receive Mail" button. Successful sending of any mail in the program's outbox indicates that the MAPI core file has been fixed and the MAPI error has been resolved.
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