They're also on the Spamhaus DROP list (the worst of the worst)
https://check.spamhaus.org/results/?query=SBL642455
On 6/30/24 12:24 AM, Jeff Pang via mailop wrote:
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?
Thanks.
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