Slow send/receive with outlook classic

Question

Outlook classic is really slow sending and receiving emails. it can take 15-20 minutes at time for an email to leave the outbox. It's also slow synchronizing folders. what's the problem?

Answer 1

Based on the screenshot, Outlook is stuck on "Synchronizing." The sending process hasn't actually failed completely; instead, the synchronization of a specific mailbox or folder is slowing down the entire Send/Receive queue, causing the program to hang for 10–20 minutes.

I suggest the following:

Press the Win + R keys and enter: %localappdata%\Microsoft\Outlook

Locate the file with the .ost extension (usually named after your email account).

Delete this .ost file or simply rename it (renaming—e.g., to .old—is safer).

Restart Outlook; it will automatically re-download your mailbox data and generate a new OST file.

Answer 2

Answer 3

Hello,

Please click "Send/Receive" at the top, then select "Show Progress."

Please provide a screenshot of this.

Please make sure to mask any private or personal information. Thank you.