Mi ez a levelezésben?

[Faragó Zsolt]

Üdv. mindekinek!
Az elmúlt három napban sokszorosára dagadtak a mail naplófájlok (Debian 
Sarge+Postfix+Dovecot), ilyen bejegyzésekkel van tele:

May 31 00:57:47 boss postfix/qmgr[2168]: A5DFF306E3: to=<atobisda at yahoo.com>, relay=none, delay=204913, status=deferred (delivery temporarily suspended: host c.mx.mail.yahoo.com[216.39.53.3] refused to talk to me: 421 4.7.0 [TS01] Messages from 195.199.189.153 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
May 31 00:57:47 boss postfix/qmgr[2168]: A598C308A3: to=<athomas911 at yahoo.com>, relay=none, delay=204912, status=deferred (delivery temporarily suspended: host c.mx.mail.yahoo.com[216.39.53.3] refused to talk to me: 421 4.7.0 [TS01] Messages from 195.199.189.153 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
May 31 00:57:47 boss postfix/qmgr[2168]: A598C308A3: to=<athomelesley at yahoo.com>, relay=none, delay=204912, status=deferred (delivery temporarily suspended: host c.mx.mail.yahoo.com[216.39.53.3] refused to talk to me: 421 4.7.0 [TS01] Messages from 195.199.189.153 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
May 31 00:57:47 boss postfix/qmgr[2168]: A598C308A3: to=<athree000 at yahoo.com>, relay=none, delay=204912, status=deferred (delivery temporarily suspended: host c.mx.mail.yahoo.com[216.39.53.3] refused to talk to me: 421 4.7.0 [TS01] Messages from 195.199.189.153 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)
May 31 00:57:47 boss postfix/qmgr[2168]: A598C308A3: to=<atilla_honeybear at yahoo.com>, relay=none, delay=204912, status=deferred (delivery temporarily suspended: host c.mx.mail.yahoo.com[216.39.53.3] refused to talk to me: 421 4.7.0 [TS01] Messages from 195.199.189.153 temporarily deferred due to user complaints - 4.16.55.1; see http://postmaster.yahoo.com/421-ts01.html)

Mi a fene ez? Mit tehetnék ellene? (A szerverünk IP-je a 195.199.189.153)
Tegnap a tartományokból való e-mail címek szerepeltek, néhányat IP 
alapján kitiltottam az IPTABLS-ben, de mindent nem lehet.


Üdv.: Faragó Zsolt