Re: [exim] Exim 4.72: preventing backscatter

> From: "Konstantin Boyandin" <konstantin@???>

> currently I have 500 to 1000 of backscatter mail sitting in mail
> queue, since it can't be delivered to forged sender of spam sent to
> non-existing local addresses.

Make sure that in acl_check_rcpt you have before any "accept":

require verify = recipient

and that a router detects non-existing local addresses, for example:

unknown_users:
driver = redirect
condition = ${lookup {$local_part@$domain} lsearch {/usr/local/etc/exim/passwd} {no} {yes} }
allow_fail = yes
data = :fail: Unknown user
no_more

localuser:
driver = accept
transport = local_delivery

If that doesn't help then post an unedited header of an example of
backscatter you are talking about, with explanation about all
email addresses and mailboxes mentioned in it.

Можно по-русски лично мне или в конференцию mailground.net.