On 07/12/16 08:53, Nev Young wrote:
Hi, Can any one offer advice about a problem I've been having with email for a few months now? I suspect it has something to do with increased security at host mx4.hotmail.com but I can not confirm this.
[SNIP]
On this subject, possibly unrelated, I've been having a lot of trouble with MS-hosted email services on my email filters and client servers. Often clients are unable to send email to them, or indeed to receive from them. I can't do much about the sending as once they've sent the email (via their ISP's SMTP servers), I have no visibility, but receiving is different. Many MS SMTP servers are bypassing the MX records, and attempting to deliver directly to the client's server. Of course this generates a 554 error (relay denied) and the email is dropped.
I can't explain it or stop it, but it continues to happen.
Cheers, Laurie.