one of the users reported getting on TBird client: "Alert an error occurred when sending mail: the mail server sent incorrect greeting 4.7.0 error too many connections from 110.170.19.146"
# grep '110.170.19.146' /var/log/maillog | wc 1349 24838 304573 I've tried # grep 'too many' /var/log/maillog Jan 23 22:13:24 geko postfix/postscreen[14348]: NOQUEUE: reject: CONNECT from [113.121.240.227]:64523: too many connections Jan 23 23:32:43 geko postfix/postscreen[14348]: NOQUEUE: reject: CONNECT from [113.121.240.227]:55473: too many connections Jan 24 06:42:00 geko postfix/postscreen[3426]: NOQUEUE: reject: CONNECT from [49.83.129.9]:65329: too many connections but that's not related I think? how can I find this and fix or understand?
