Get all new messages does not work on all accounts

Question

I have several accounts set up. using "Get all new messages" works about 20 percent of the time.
I have tried "repairing" all folders - no change
tick to "include this server when getting new email" is greyed out
All accounts pop off the same server, same isp.
Used to work - but has got worse and worse over the past year.
Can't find anyone else on the forums with the exact same issue.

Answer 1

Check : Make sure all of these are selected for the problem pop mail account
* Tools > Account Settings > Server Settings
* select : 'Check for new messages at startup'
* select : ' check for new messages every eg: 15 minutes
* select : ' Automatically download new messages'
* click on OK to save and close account settings.
If these settings are already selected, then something must be overriding a setting.
So try this:
* Tools > Options > Advanced > General tab
* click on 'Config Editor' button - it will tell you to be careful :)
* In the top search type: biff
* look for this line : mail.server.default.download_on_biff;
* If Value = 'false', double click on that line to toggle the 'False' to 'True' or right click on line and choose 'Toggle'
* close window - top right X
* click on OK to save and close 'Options'.