In inbox not all emlx files appear

I edited the question, while the enclosed files contained emailaddresses. Thus: files are not there anymore.

I have found the answer myself: rebuilding solves the problem.

I lost emails. This was caused by doing things with my accounts. In the finder I can find my emails, but I cannot get them displayed in the Inbox. I renamed the POP.mbox files, but it didnot work. Then I imported through File > Import the files I could find in the Finder but not in the INBOX.

The result is shown in the file mail2,here enclosed. I want to get the INBOX of the imported part in the real INBOX ("that is called "inkomend"). In the eclosed file mail1, the files in the Mailfolder in the Library are shown: now there are 3 POP files, of which one is empty. I want to end with one POP file.

What have I to do, to get is sorted out?