Office 365 has outgoing mail limit of 30 messages per minute, then after that the messages get marked as spam and likely not delivered.
I need some smtp account/service that allows me to control the outflow of messages (say 100 per 15 minutes). Any emails in excess of this limit would be queued for a later send.
I would still want my O365 mail to be tracked in this service and visa versa.
Any experience or suggestions?