Resolution: Check if the user is able to browse the intranet and internet.
If the user has no connectivity, first resolve the network connectivity issue.
If the user is able to browse the intranet and use internet follow the steps below.
1. Have the user close their local and/or server mail file.
2. Click on the File menu, select Preferences and then click on User Preferences.
3. On the left hand side of the window, click on Ports.
4. Click once on TCP/IP in the Communication Ports list.
5. Click on the TCPIP Options button
6. Increase the time-out value to 60 or 90 seconds. Note:
If the user already has 60 seconds or more, decrease the time-out value to 5 seconds.
7. Click on OK.
Follow These Step :8. Have the user perform the action that was giving them the error.
9. If the problem persists, clear and configure the Personal Web Navigator database.
10. Close Lotus Notes.
11. Click on the Windows Start button then click on Run.
12. Type: c:\notes\notes.ini in the Open: text field, then click on OK.
13. Search for the line similar to TCPIP=TCP, 0, 15, 0 as shown in the screen capture below.
14.Change this entry to TCPIP=TCP, 0, 15, 2000 ,,12288 (One space in between each comma and two spaces after 2000).
15. Save and close the notes.ini file.
16. Start Lotus Notes and have the user perform the action that was giving them the error.
17. If the problem still persists and is related to a local database replica (example: sending mail from the local mail replica), rename the old replica and recreate it.
18. If the above steps have not resolved the user's issue, reinstall TCP/IP. .