> What is the best way to configure for the following message from outlook.com > in the maillog: > > said: 451 4.7.652 The mail server [<source_server_ip>] has exceeded the > maximum number of connections. > > Please note the email is being created on a VM with <source_server_ip>. > The email is then sent to our new mail server via SMTP. It appears outlook > is complaining about the number of connections for email coming from the > source_server_ip -- only one ip address.
I reduced the number of processes available to the outlook transport to 12 in master.cf. This eliminated the "maximum number of connections" message.