We been receiving the below error when trying to deliver to BT.
"smtp;421 Too many messages (1.5.6.1)"
We have adjusted the number of connections we make to BT all the way down to 1 connection, only allowing 30 minutes via that connection, and 30 minutes intervals between connections.
Does anyone know what is an acceptable number of connections, meesages per connection, and time frame at which said number of connections can be made?
