[Dovecot] sieve: deleteheader sometimes fails [bug]

Hi,

We're using Dovecot 2.1.16 with Pigeonhole 0.3.4. Mail is delivered by exim4 to the dovecot LDA.

Sometimes users are unable to delete headers. I've narrowed the problem down to preceding the deleteheader command with a query against the body.

A simple example: """ require ["body", "editheader", "fileinto"]; if body :contains "!TEST!" { fileinto "INBOX.Trash"; stop; } deleteheader "Subject"; addheader "Subject" "Testing"; """

Putting the "deleteheader" above the "if body" causes it to be deleted correctly. Although I've used Subject in this example it happens for other headers.

Cheers, Dan