It appears that Jeff Pang via mailop <jeffp...@aol.com> said: >I have two different mailservers. >both them continue to get the requests from a sender as the following. > >Jun 30 06:20:51 mx postfix/smtpd[1081379]: NOQUEUE: reject: RCPT from >unknown[193.37.41.106]: 550 5.7.25 Client host rejected: cannot find >your hostname, [193.37.41.106]; from=<t...@sxyprn.com> >to=<im...@praviatrust.com> proto=ESMTP helo=<[193.37.41.106]> > > >do you know what is the sender "t...@sxyprn.com" and what's the purpose >of him?
Sure looks like a lame attempt to find open relays. I still get a fair number of them. You might write to ab...@secureanalitics.com which is the RIPE abuse contact for that IP and ask why they keep probing your mail servers. R's, John _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
