On Sat, 29 Jun 2024, Jeff Pang wrote:
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?
Seems like a simple open relay test, though whether white, grey, or black hat is unknown but a To of img03 suggests a compromised web site is possible. There is currently a PTR for that address, of logpeach-tell.maximumglitter.com, though whether it appeared recently or your resolver failed isn't certain.
/mark _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
