"Relaying denied" v mail logu

[Robert]

Živjo

V mail logu sem opazil sledeče:

Nov 28 06:16:24 asterix sendmail[17120]: gAS5GOL17120: 
ruleset=check_rcpt, arg1=<sgp at mindless.com>, relay=reverse226.genius.ro 
[213.154.141.226] (may be forged), reject=550 5.7.1 
<sgp at mindless.com>... Relaying denied. IP name possibly forged 
[213.154.141.226]
Nov 28 06:16:25 asterix sendmail[17121]: gAS5GPL17121: 
ruleset=check_rcpt, arg1=<chris at accesscomm.ca>, 
relay=reverse226.genius.ro [213.154.141.226] (may be forged), reject=550 
5.7.1 <chris at accesscomm.ca>... Relaying denied. IP name possibly forged 
[213.154.141.226]
Nov 28 06:16:26 asterix sendmail[17121]: gAS5GPL17121: 
ruleset=check_rcpt, arg1=<brian at aboundinglove.org>, 
relay=reverse226.genius.ro [213.154.141.226] (may be forged), reject=550 
5.7.1 <brian at aboundinglove.org>... Relaying denied. IP name possibly 
forged [213.154.141.226]

itd...

teh zapisov je cca. 100 v eni sami minuti, potem pa jih ni nikjer več, 
ne prej ne potem. Kaj to pomeni? Nikjer namreč nisem zasledil naslova 
pošiljatelja (če bi to bil kateri od mojih uporabnikov). Ali imam 
kakšnega trojanca na mreži ali kaj podobnega?

lp
robert