ka darot su tokiais hostais?

May 14 00:05:55 mail postfix/smtpd[91002]: NOQUEUE: reject: RCPT from 
unknown[217.117.17.117]: 450 4.7.1 Client host rejected: cannot find 
your hostname, , [217.117.17.117]; from=<zzz@kaspersky.lt> 
to=<zzz@zzzz.lt> proto=ESMTP helo=<mail.kaspersky.lt>

cia matau 217.117.17.117 neturi reverso.


kitas pvz:
May 14 00:11:12 mail postfix/smtpd[49122]: NOQUEUE: reject: RCPT from 
unknown[62.212.222.104]: 450 4.7.1 Client host rejected: cannot find 
your hostname, [62.212.222.104]; from=<zzz@prokuraturos.lt> 
to=<zzz@zzz.lt> proto=ESMTP helo=<is.prokuraturos.lt>

cia jungiasi is 62.212.222.104,
o nslookup is.prokuraturos.lt = 62.212.222.101


mano aprobojimai postfixe:
smtpd_client_restrictions =
     permit_mynetworks,
     permit_sasl_authenticated,
     reject_unknown_client_hostname,
     reject_rbl_client sbl.spamhaus.org,
     reject_rbl_client xbl.spamhaus.org,
     reject_rbl_client bl.spamcop.net,
     reject_rbl_client list.dsbl.org

smtpd_helo_restrictions =
     permit_mynetworks,
     check_helo_access hash:$base/access_helo,
     permit_sasl_authenticated,
     reject_invalid_helo_hostname,
     reject_non_fqdn_helo_hostname


suprantu kad galima idet i access lista tuos hostus,
bet kai serveriu 15... tai negi deliosi pastoviai tokius hostus.
???