[Dovecot] Dovecot headers at start of text returned to KMail

[Mike Abbott]

> To recover from this error I think I need to:
> 
> 1. service dovecot stop
> 2. rename all the mail files to have the S=nnnn match the size of the file on disk

> 3. remove all the dovecot.* files
> 4. service dovecot start
> 
> Is this correct?

I believe so but I'm not an authority on this part.  Note that removing the dovecot.* files has other side effects, like making your clients re-download all the messages again, and losing any keywords.

If you instead just remove the X-Spambayes-Trained header (and any other headers that might have been added after delivery) from the affected messages (using, e.g., sed), you might be able to skip step 3.