Gmail – Getting [SYS/TEMP] Temporary system problem when importing to Gmail from Google Apps

I have a Google Apps (for education) email address for work. I am leaving the job, and want to import all of my emails into my personal, regular Gmail account.

I attempted to use the tool called Mail Fetcher ("Check mail from other accounts using POP3"), as well as "Import Mail and Contacts". I followed the directions Google gives. However, it just generates an error.

Below is the error message I see when I try to use Mail Fetcher:

Email address: ln****@t****.org

There was a problem connecting to
pop.gmail.com

Show error details:
Server denied POP3 access for the given username and password.
Server returned error: "malformed command e127mb198161291itb"

Username:

Password: *******

POP Server: pop.gmail.com

Port: 995

A different time, the error read as follows:

Server returned error: "[SYS/TEMP] Temporary system problem. Please try again later. s82mb74850398ioe"

I have also received "The server has timed out" error. But I have tried this on several different days, and it still isn't working.

Could someone help me figure out how to import my mail?

Postscript: I successfully imported all of my mail into a different personal Gmail account. I still don't know why the first one didn't work.