I see what you are describing on a primary MX of mine, same IP address connecting multiple times roughly every hour.
May 29 22:31:44 irys postfix/submission/smtpd[444857]: warning: hostname scanner-401.hk2.censys-scanner.com does not resolve to address 199.45.154.4: Name or service not known May 29 22:31:44 irys postfix/submission/smtpd[444857]: connect from unknown[199.45.154.4] May 29 22:31:44 irys postfix/submission/smtpd[444857]: lost connection after UNKNOWN from unknown[199.45.154.4] May 29 22:31:44 irys postfix/submission/smtpd[444857]: disconnect from unknown[199.45.154.4] unknown=0/1 commands=0/1 That seems more often than I remember as well but I don't particularly keep an eye on their connections. -Frost On Wed, May 29, 2024 at 7:08 PM J Doe via mailop <mailop@mailop.org> wrote: > On 2024-05-29 17:16, Mark Alley via mailop wrote: > > > The website is here below; I get this in my web logs occasionally. > > > > https://about.censys[.]io/ > > > > User Agent: Mozilla/5.0 (compatible; CensysInspect/1.1; > > +https://about.censys[.]io/) > > > > - Mark Alley > > Hi Mark, > > Thank you for your reply. I am familiar with what Censys is, but what I > found unusual is that the frequency with which they scan has noticeably > increased over the last week or so ... at least from the perspective of > the mail server I manage. > > I wasn't sure if others in the Mailop community were also seeing this or > whether I was just "lucky"! > > - J > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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