Am 11.06.21 um 06:14 schrieb Noel Butler via mailop: > > MS sending out mail with no rdns? > > > Jun 10 09:20:20 cust-mta01 postfix/smtpd[8137]: NOQUEUE: reject: RCPT from > unknown[40.92.62.80]: 554 5.7.1 Client host > rejected: cannot find your reverse hostname, [40.92.62.80]; > from=<x...@outlook.com> to=<x@xxxxxx> proto=ESMTP > helo=<AUS01-SY4-obe.outbound.protection.outlook.com> > This is probably something that you wouldn't miss. Outlook.com and hotmail.com accounts (most likely created by bots) are being used to spam massively for the last couple of days/weeks. > $ host 40.92.62.80 > Host 80.62.92.40.in-addr.arpa. not found: 3(NXDOMAIN) > > Michael, any chance you can get this sorted? >
Please, get this sorted by blocking the outgoing hotmail/outlook spam :-) Assigning a valid PTR record to that IP address is optional and should be done after the first step... Cheers, Hans-Martin _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
