I’m not sure who is more incompetent, Yahoo or Microsoft, when it comes to email systems. Right now Outlook is down. Outlook is not totally down but can only accept a single message at a time. I’m a one man operation doing spam filtering and email hosting and I have better uptime and email services than Microsoft does. Go figger!
“421 4.3.2 The maximum number of concurrent server connections has exceeded a limit, closing transmission channel”