[Dovecot] Mailbox isn't a valid mbox file

[Timo Sirainen]

On Jun 7, 2009, at 11:14 PM, Kenneth Porter wrote:

> Getting "Mailbox isn't a valid mbox file" on 1.2rc2 after  
> transferring mail from an ancient 0.99.13 system. The first line of  
> the file looks ok. Curiously, it's one of my archival folders of  
> this list. Here's the first header from the top of the file:
>> From tss at iki.fi  Sat May  1 21:48:17 2004
..
> It would be nice if the code that verified the mailbox format would  
> log details about what it disliked.

It's always only the From line that it doesn't like. Do you really  
have "tss at iki.fi" instead of "tss at iki.fi"? That's why it's not  
working. It's expecting: From single-word timestamp.