On 4/11/20 4:08 PM, antlists wrote: > > Okay, it was a long time ago, and it was MS-Mail (Exchange's > predecessor, for those who can remember back that far), but I had an > argument with my boss. He was well annoyed with our ISP for complying > with RFC's because they switched to ESMTP and MS-Mail promptly broke. > The *ONLY* acceptable reason for terminating a connection is when you > recieve the command "BYE", so when Pipex sent us the command EHLO, > MS-Mail promptly dropped the connection ... >
Exchange used to do all manner of stupid things, but now that Microsoft is running it themselves and making money from O365, they seem to have figured out how to make it send mail correctly. Nowadays they prefer to cripple Outlook with non-Exchange protocols, so that our users complain about not having shared calendars when we've had CalDAV integrated with IMAP for 10+ years.
