We have a MDaemon email sevrer hosting in our office in Vietnam using lease line 1.5Mbps. Inside Vietnam, our staff can access email without any problem but in some countries like Australia, HongKong ...
Emails between us and a specific counterparty are delayed. To give you some idea, we send 10 messages and over 40% arrive with a 20 (or greater) minute delay. We even had two messages arrive in 50 ...