We use a cloud vendor to scan all of our incoming and outgoing emails. We are starting to run in to an issue where we are sending over 100 emails in the TO, CC or BCC fields.
According to my vendor:
"By default, the platform only accepts 100 RCPT TO entries per message body (DATA).
If the sending server issues more RCPT TO entries, then the platform will respond with "452 Too many recipients".
This transient error code should trigger the sending mail server to provide the DATA for the first 100 recipients before it provides the next batch of RCPT TO entries."
We are using Exchange 2010 and I am not sure:
1. How to tell if my server is actually respecting the transient error and then sending them in batches.
2. If it isn't sending them in batches, how do i make it do it or does a 3rd party program exists to do this?
Has anyone come across this issue and found a solution?