[exim] exim-4.96rc0 Tainted arg

Hi,

This transport survived 4.95, but not anymore with 4.96rc0 as this error
shows:

2022-05-01 11:19:58 1nl4o7-0006GQ-10 ** /var/spool/virtual/
mydomain.org/johndoe/Maildir <johndoe@???> R=virtual_domains
T=dovecot_virtual_delivery: Tainted arg 2 for dovecot_virtual_delivery
transport command
: 'johndoe@???'

How do I need to de-taint the arg 2?


dovecot_virtual_delivery:
driver = pipe
return_output
command = /usr/local/libexec/dovecot/deliver -d $local_part@$domain -f
$sender_address
message_prefix =
message_suffix =
delivery_date_add
envelope_to_add
return_path_add
log_output
user = mailnull
temp_errors = 64 : 69 : 70: 71 : 72 : 73 : 74 : 75 : 78

--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-)