I did not realize that nonexist host names. I believe they basically ignore faults when they produce them but they keep pushing us to follow their requirements.
On 16 Jan 2018 1:59 p.m., "Jim Reid" <j...@rfc1035.com> wrote: > On 16 Jan 2018, at 10:49, jin&hitman&Barracuda <jinhit...@gmail.com> wrote: > > We are having difficulties while delivering mails to Microsoft's domains like hotmail and outlook. They appear to have a DNS problem which is causing outbound mail to fail. Their SMTP servers are using non-existent hostnames when they say HELO. This DNS brokenness may well be wreaking havoc for those using SPF, DKIM, etc when speaking to M$ mail servers or receiving email from them.
