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Fix Outlook Error 0x8004060c while Trying to Send/Receive Email

Email | 7 min read| Brayden Mitchell | Updated On - November 19, 2022

MS Outlook is quite useful among professionals and more organizations are embracing the email platform due to its simplified user platform and other friendly features. Microsoft who is trying everyday to improve the Outlook and is focusing on improving its services, wants to remove all the bugs faced by the user while using the email platform.

There are the numbers of issues faced by the professionals while using the email platform, but the most notorious issue comes to play while exchange of the emails from the exchange server. This error message is not difficult to recognize. You must have seen the following messages in the dialog box.

-Task “Microsoft Exchange Server – Sending” reported error (0x8004060c): ‘The message store has reached its maximum size. To reduce the amount of data in this message store select some items that you no longer need and permanently delete them.’

-Task “Email Address- Sending and Receiving” reported error (0x8004060c): ‘Unknown Error 0x8004060c.’

-Task “Microsoft Exchange Server- Receiving” reported error (0x8004060c): ‘Unknown Error 0x8004060c.’

Microsoft Exchange Server - Sending" reported error (0x8004060c)

Manifestation of Outlook Error ‘0x8004060c While Trying to Send/Receive Email’

To deal with such error user must be either be qualified one to sort it by own or the user must be ready to take the assistance from an external software. It could be a third-party software that can sort out the issues within minutes without involving any algorithmic approach directly over the screen.

Before counting on any software for the rescue to the problem, user must understand the reason for occurrence of such error. Many professionals suggests following reasons for the occurrence of error (0x8004060c):

  • Corruption of OST files due to excessive file size.
  • Technical snags in Exchange Server.
  • Network issue gives rise to synchronization problem that leads to error (0x8004060c).
  • PST file size would have exceeded file size limit.

So it can be clearly inferred that no clear majority claims a single reason to be responsible for the occurrence of error (0x8004060c). Thus, before moving to the resolution users must know how to technically handle the situation.

How to resolve Outlook error (0x8004060c) manually?

To resolve the error (0x8004060c) manually there are certain fundamentals that must be known. It includes the knowledge of location of registry files, methods to reduce the OST and PST file size and file size limitations.

The issues related to Outlook (0x8004060c) error can be resolved in following ways:

  1. Resetting mailbox maximum capacity by altering registry files.
  2. Compacting OST/PST file size.
  3. Create new files to archive the data from the old ones.
  4. Splitting oversized files to reduce 2 GB truncation error.

These solutions are explained as follows:

#1. Resetting Registry Files

To enhance the Outlook message capacity the Windows registry limits must be enhanced. To do so user has to perform the following steps:

  • Press Windows+R and open RUN Windows. Type regedit and click OK to open the Registry Editor.
    Type regedit and click OK to open the Registry Editor
  • In Windows Registry look for the following path depending upon the variant of Outlook being used.
    For Standard users:
    -Outlook 2013: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\PST
    -Outlook 2010: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\PST
    -Outlook 2007: HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\PST
    -Outlook 2003: HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\PST
    For Domain Administrators: (Group Policy)
    -Outlook 2013: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Outlook\PST
    -Outlook 2010: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\14.0\Outlook\PST
    -Outlook 2007: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST
    -Outlook 2003: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Outlook\PST
  • If the PST key doesn’t exist, then right-click at Outlook key and select New -> Key and give the name to the key.
    If the PST key doesn’t exist, then right-click at Outlook key and select New
    Key and give the name to the key
  • Click at the PST key and look for MaxLargeFileSize and WarnLargeFileSize.
    Click at the PST key
  • Double click to open MaxLargeFileSize value. Select Decimal. At the Value Data box set the new decimal value to maximum size limits. For Outlook 2003 and 2007 user can specify till 20 GB; For Outlook 2010 and 2013, the maximum limit is 50 GB. Once done select OK.
    Double click to open MaxLargeFileSize value
  • Then click WarnLargeFileSize. Select Decimal followed by entering value into the value box. The Warning size should be 95% of the MaxLargeFileSize value entered before. Select OK.
    Then click WarnLargeFileSize
  • Close the registry files. You have successfully changes the registry settings and expanded the Outlook mailbox saving capacity.

#2. Compacting OST/PST Files

Before entering into compaction of OST/PST files, user must check the Outlook version they are using. For Outlook 2007 users, open the Tools menu, while Outlook 2010 users must open the File Tab on the ribbon click Info and Choose the Account Settings.
Before entering into compaction of OST/PST files, user must check the Outlook version

  • Click Account Settings->Microsoft Exchange-> More Settings-> Advance tab->click on Offline Folder File.
  • Click Compact Now.
    Click Compact Now
  • The compaction of OST and PST has been success fully done.

#3. Recreating OST Files

To recreate OST files user has to follow these steps:

  • Close the Outlook application.
  • From Control Panel go to Mail Setup dialog box and select the profiles by clicking on Show Profiles.
  • Now click Properties->Mail. From Mail go to E-mail tab-> Exchange Account-> change button.
  • Uncheck Use Cached Exchange Mode check box. Click More Settings ->Advanced Tab->Offline Folder File Settings-> Disable Offline Use.
  • After clicking Disable Offline button, click Yes to confirm.
  • Click Offline Folder File Settings-> click Ok.
  • In dialog box click Yes. Check the Use Cached Exchange Mode from the settings followed by OK->Next->Finish.

Note: Users can also try recreating the .ost file in case of corruptions by deleting the file from its location (find it through Account Settings in Outlook or directly go to C:\Users\Username\AppData\Local\Microsoft\Outlook) and then restart the Outlook application with configured Exchange Server account to create a fresh updated .ost file.

#4. Splitting oversized file to reduce 2GB Truncation error

This is the best way to reduce the OST size and eliminate the unwanted mailbox entries.

  • Open Scanost.exe from the default location –
    :\Program Files\Microsoft Office\
  • Double click on the OST file to be reduced. Hit Enter.
  • Now, open the truncated file with Scanost.exe tool.
  • Once done, click again on the file to conform its truncation. If the concerned file does not get open then redo the process once more.

Also, try archiving the old .ost emails based on time filter using the Archive option in the Cleanup Tools feature in the Outlook application to a desired saving path location. There is a separate AutoArchive feature in the Outlook options using which you can decide the archiving frequency, old items saving destination, deleting actions on old items (delete on every –time or permanently delete old items, etc.
Archiving the old .ost emails based on time filter

There are many chances that the file error ‘0x8004060c While Trying to Send/Receive Email from Outlook’ may get resolve with such resolutions; however, if we consider 1% chance of failure then we even have the solution for such issue. In such cases user is recommended to take assistance from a reliable third-party tool like OST to PST Tool. To evaluate the performance of the tool, the trail version can be tried that exactly works like the licensed version with varied success rate. Upon satisfaction with its performance user can purchase the licensed version without any delay. Just try once before entering into technical complications.

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