Viktor,
What evidence do you have for that? The error messages are about
message arrival rate for the same user. I am quite familiar with
these, and they are not caused by a small number of closely spaced
messages. Rather this symptom happens when a user quickly receives
a large number of messages due to a flood of mail coming in.
Here is what I've got so far:
1. They will block messages only from my server. Other servers will able to deliver messages to my mailbox while my server reports an error - so this is not related to the message flood, something else is happening.
2. They block not one recipient, but everyone on my domain.
3. Error message is and for last couple weeks was the same: "450-4.2.1 The user you are trying to contact is receiving mail at a rate that prevents additional messages from being delivered..."
4. They can lock on first message they receiving from my server after hours of no communications between.
5. Their response is:
As per the logs so far It your server is making more than one connection in less than a second and this is strange as It does not seem to be configured this way.In this scenario even tho the queue is empty, making a few connections at once will cause a lock out, even if you send 3 messages for the day if they are sent in less than a second we will lock the connection.
Thank you,
-sashk
