ne sprejme maila

lep pozdrav!
zakaj nekatere maile lahko pošljem , nekatere pa ne morem, pride nazaj odgovor?

This is the mail system at host smtp.volja.net.

I’m sorry to have to inform you that your message could not
be delivered to one or more recipients. It’s attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

: host email.aon.at[195.3.96.71] said: 553 sorry, your
mailserver [217.72.64.59] is rejected by email.aon.at based on
http://cbl.abuseat.org or http://www.njabl.org or
http://www.dnsbl.manitu.net (in reply to MAIL FROM command)

kaj je narobe?
hvala