If the drive isnt fragmented or Outlook is still slow to receive emails, head to the next solution. 3. Compact or Compress Outlook PST As mentioned earlier, a large PST could also cause Outlook to slow down.

In this post, we cover solutions to fix this issue of slow Outlook performance while sending or receiving emails in Outlook 2007, 2010, 2013, 2016, and 2019.

However, with time and as the mailbox (or PST) size grows, Outlook often starts showing signs of degraded performance.

A most common outcome of this degraded performance and a recurring Outlook issue is that the application starts taking more time to send or receive emails and download attachments.

Even after several refreshes, the new emails and attachments are displayed only after a while.

Experts Opinion: Outlook experts suggest to check the health of Outlook PST file using SCANPST.EXE or a trusted PST recovery software.

In most cases, errordamage in the Outlook PST file is responsible for the delay in receiving Outlook emails.

Also, learn solutions to fix the issue of slow receiving or sending emails on Outlook 2019, 2016, 2013, 2010 2007.

Why is Outlook Slow to Send or Receive Emails Whenever an email is received in your inbox, Outlook takes the default action of writing it to the PST file.

So naturally, if Outlook is taking more time to receive emails, the writing to the PST part is the first place to look for possible problems.

The problem could be fragmentation or damage to the PST file or an oversized PST.

A large size PST file is more prone to corruption and hence, you should split PST file or keep backup to avoid Outlook errors.

If thats the case, Outlook could be spending all its time not in downloading the email but in trying to save it within the faulty PST.

So you should focus your efforts on trying to fix and repair Outlook PST to resolve this error.

How to Resolve Outlook Send or Receive Slowdown Problem If emails are taking a long time to arrive in Outlook or Outlook is slow to download emails and attachments, try the following solutions to get rid of the problem: Backup the PST file before applying these solutions.

Check hard drive for bad sectors In case your hard drive has developed bad sectors and your PST file is stored at a location on the hard drive that includes one of those sectors, it could be a cause of this Outlook slowdown problem.

Thus, as a first step, use a tool such as CrystalDiskInfo and check hard drive health status and SMART information.

Make sure drive health is good and there are no Reallocated Sector Count warnings.

You can also run a Check Disk command in Command Prompt window.

CHKDSK r 1 CHKDSK r Type Y and press Enter if asked to force dismount volume.

The CHKDSK command will find out and repair hard drive errors.

Try sending a few emails and check if Outlook sendsreceives emails normally.

Defrag the hard drive Disk fragmentation is a process that occurs naturally, as files are constantly being written, edited, deleted, and resized.

And its quite possible that your PST file may be fragmented and thats why Outlook is taking time to load emails and attachments.

So defragmenting your hard drive would be a good idea here if you havent done it recently.

To defragment, simply type defrag in search and click on Defragment and Optimize Drives.

Select the drive volume where your PST file is stored and click Optimize.

If the drive isnt fragmented or Outlook is still slow to receive emails, head to the next solution.

Outlook For Mac Delay Images