Blackberry - problem with BES

Hello,

we have Domino 9.0.1 and BES 5.0.4 server. Sometimes the BB phone go crazy and instead email address of senders insert in the field “from” domain address… it looks like this:

SMTPClient: MAIL FROM:Name_Surname/OU/Domain%Domain@xxx.xxx BODY=8BITMIME SIZE=10768

Such message will get into mailbox in Domino domain (deformed format of name) but not to the internet. The only thing that a little bit helps - restart of the server. Sometimes is some weeks calm but then is problem twice of week.

thanks

Dada