ERR IN-USE Unable to lock maildrop

Simon Matter simon.matter at
Fri Aug 15 16:06:59 EDT 2003

> Hello,
> I wrote about this problem ealier...
> I cannot loggin to e-mail box with pop3 and i got this message in outlook
> express:
> There was a problem logging onto your mail server. Your Password was
> rejected. Account: ' (2)', Server: '',
> Protocol: POP3, Server Response: '-ERR [IN-USE] Unable to lock maildrop',
> Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number:
> 0x800CCC92

I really like those cool M$ error codes :)
Are you sure that there is only one client trying to connect to this
mailbox via POP3? The problem is that while you can have multiple IMAP
connections simultaneously to the same mailbox, you can only have one POP3
session per account.


> I can log  into this e-mail box with imap but I cannot delete any e-mail
> messges.
> I am using Cyrus IMAPD and SASL.
> Please help me what to. The rest of e-mail boxes works very well.
> Bartosz

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