Introduced properties to define default behavior for contact collection on mail access/on mail transport in file 'user.properties'. By default these values are disabled.

# Define the default behavior whether to collect contacts on mail access
# Note: Appropriate user access permission still needs to be granted in order to take effect
com.openexchange.user.contactCollectOnMailAccess=f alse

# Define the default behavior whether to collect contacts on mail transport
# Note: Appropriate user access permission still needs to be granted in order to take effect
com.openexchange.user.contactCollectOnMailTranspor t=false