local_parts = ${if match_domain{$domain}{+virtual_domains}\
{${if exists {${extract{directory}{VDOMAINDATA}{${value}/callout_users}}}\
{${lookup{$local_part}lsearch*{${extract{directory}{VDOMAINDATA}{${value}/callout_users}}}{$local_part}{}}}{}}}\
{${lookup{$local_part}lsearch{/etc/exim4/callout_users}{$local_part}{}} : \
${lookup{$local_part}lsearch{/var/lib/misc/$primary_hostname/mail-callout}{$local_part}{}}}}
!hosts = +debianhosts : WHITELIST
local_parts = ${if match_domain{$domain}{+virtual_domains}\
{${if exists {${extract{directory}{VDOMAINDATA}{${value}/callout_users}}}\
{${lookup{$local_part}lsearch*{${extract{directory}{VDOMAINDATA}{${value}/callout_users}}}{$local_part}{}}}{}}}\
{${lookup{$local_part}lsearch{/etc/exim4/callout_users}{$local_part}{}} : \
${lookup{$local_part}lsearch{/var/lib/misc/$primary_hostname/mail-callout}{$local_part}{}}}}
!hosts = +debianhosts : WHITELIST