[Xymon] recovered mails with attachment

Hi all,

yesterday I started migrating from xymon 4.0.2 to 4.3.7. Everything went easy, except of one thing. Notification mails for service failure / critical I receive as 'normal' mail. Notification mails for service recovered I receive a blank mail, with message in a file called 'Mail-Attachment'.

Thx in advance for any hint Daniel