Introduced file currently holding boolean setting com.openexchange.mailmapping.lookUpByDomain.

Setting this option to true means that the domain part of a mail address (the part after the @ sign) is used to find a matching context by checking the login mappings. That mechanism does only work if Open-Xchange setup strictly defines a dedicated and unique domain per context. Otherwise that look-up mechanism will lead to wrong results.

Setting this option to false means that the mail address is going to be looked-up on a per database schema basis. For each known schema a query is performed to check whether there is such an internal user.

Default is false