Mailbox is locked by POP Server


I have a Virtual Dedicated Server with GoDaddy and one of my clients is unable to delete e-mails through webmail.  (She's also receiving an uncontrollable amount of spam and receives messages late.)  This is only happening to her though, none of my other clients and I myself am not having this problem with the POP server.  

When I go to delete a message through SquirrelMail, this is the message I get:

ERROR: Could not complete request.
Reason Given: Mailbox is locked by POP server

If you can provide some help that'd be great.  Thank you very much,

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cjl7freelance for hireCommented:
try to restart the pop server (dovecot?!)
ewindsorAuthor Commented:

I think I have cyrus and I tried restarting it, no change.  

I've restart my whole server a couple of times since this has happened.  

Where is the config information for each domain stored?  Maybe this will help solve the mystery.  


ewindsorAuthor Commented:
Here's some lines from the /var/log/maillog regarding this account:  

Oct 21 03:23:25 ip-72-167-29-146 lmtpunix[7898]: IOERROR: fstating sieve script /var/lib/imap/sieve/domain/r/ No such file or directory

I have several domains on this server - but this is the only one that has the IOERROR on it - any idea why?  

Also, these e-mails keep repeating themselves.  It's like spam making spam again and again.  
ewindsorAuthor Commented:
I simply deleted the account and reinstalled it and it worked!  

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