Downloading again and again from Eudora - related to index sync?

[stevenavery]

WAIT - AT THE MOMENT IT IS WORKING RIGHT!
Will come back in a bit.

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First, my Runbox usage, for now, is meant to be simply POP download daily.
Down to zero, up a bit, download.
No synchronization (does that mean iMap?) needed at this time.

My Eudora is continually downloading about 4,000 emails, even though my actual load in Runbox, when I visit the email in Runbox 6, is approximately 500.

However, if I am in Runbox 7, without an index, it shows 4,000 plus.
If I hit “Synchronize Index” it goes down to the 500 or so.

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I realize that there has been some posts about quirky behaviour, like this one.

Synchronizing Account Index

I’m getting some strange behaviour in my Inbox when Synchronizing the Account Index. My inbox (which is empty in IMAP or legacy Runbox webmail) has a number of emails appear when Synchronization is on. These emails are not readable as the preview window is blank. If I search, however, I can retrieve a message and view its contents. Does one have to manually turn off synchronization or is this a known bug?

Can I have a theory as to why this occurs, and the simplest way to prevent?

Again, I need only SIMPLE POP download, at this time!

Eudora has leave mail on server unchecked.
mail.runbox.com -incoming and outgoing
was working fine for a year or two

Thanks for the wonderful forum!