Wildcards are supported, but don't default host-name, otherwise you might get unintended results. Thus, you would probably want to use: * Filter= Also,arkan*@* AFAIK, spaces are not a valid syntactic element of the wildcard parser, though the use of non-contiguous asterisks are e.g., * Filter= Also,*postmast*@* would "catch" any userid that had POSTMAST anywhere within the string: beginning, end, or anywhere in-between. When asking about overhead in filtering, don't forget to factor in the overhead (result) of NOT filtering. /Pete