More information is required in order to troubleshoot this issue. Please
provide the following information:
1) Version of Outlook
2) Email environment: Exchange, POP3, etc.
3) Does you have a PST? If so, what is the size?
4) Are there any error messages/numbers?
5) Have you checked the application event viewer for any Outlook or
Office-related errors? If there are, what are the Event ID number(s) &
source(s)?
6) What troubleshooting steps have you taken yourself, so you're not told to
take steps you've already tried?
7) Is the antivirus scanning incoming/outgoing mail?
8) What is the polling frequency for mail?
9) Are there any COMs, Add Ins, synch software (for handheld), Fax software
running?
10) Are there any installed desktop search tools or toolbars in Outlook,
such as Google?
