Forum Discussion
Office365 splits emails
We just sent an email to multi recipients(To or Cc) . This is one email.
But, office365 sometimes splits the email into 2 or 3 sessions according to the recipient.(We found in the logs)
We'd like to know the cases that Office365 splits the email.
When it needs to? Exchange Online ( and any mail server) will bifurcate a message and send as multiple messages when required. Exchange determines when its the best time to do this.
You can read about some that here:
https://technet.microsoft.com/en-us/library/bb430743(v=exchg.150).aspx
Is it causing you problems?
And really, why would you care about how Exchange Online bifuricates messages? As Andy says, the processing in the transport service contains algorithms that figure out the best time to split messages for delivery to multiple recipients. This happens automatically and Exchange has been doing it for a very long time. I don't think there is different behavior in Exchange Online than you see in on-premises servers, so what is the problem and why is it a problem?
In any case, the transport services does its own thing and you're not going to be able to change it.
