[exim] ACL error "for linear search: No such file or directo…

Hi,

i use a rule to deny some tld spammers, but i need a condition to a
whitelist file

                senders = /opt/exim/deny_senders

logwrite = too much spam from TLD

i agree this condition:

condition = ${if
exists{${lookup{$sender_address}lsearch*@{${perl{getmaildir2}{$local_part@
$domain}}/.spamassassin/whitelist{no}{yes}}}}}

but i see this error:

temporarily rejected after DATA: failed to expand ACL string "{if
exists{${lookup{$sender_address}lsearch*@{${perl{getmaildir2}{$local_part@$domain}}/.spamassassin/whitelist{no}{yes}}}}}":
failed to open /mail///.spamassassin/whitelist{no for linear search: No
such file or directory

where is my error in the sintax?

Regards,