problem s Postfix

[Peter Gazo]

Ahojte,

mam problem s mojim email serverom na ktorom mi bezi Postfix

ked posielam emaily tak mi vrati toto a email nedosle:

This is the mail system at host server.edu.sk.

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
<annab na antechnet.sk> <annabirova na antechnet.sk>: host
server.antechnet.sk[11.124.233.3] said: 554
    5.7.1 Service unavailable; Client host [87.197.6.11] blocked using
    dul.dnsbl.sorbs.net; Dynamic IP Addresses See:
    http://www.sorbs.net/lookup.shtml?87.197.6.1
<http://www.sorbs.net/lookup.shtml?87.197.61.178>1 (in reply to RCPT
TO
    command)



co stym?

Dakujem za kazdu radu