I am looking for best practices to recommend number of outgoing IPs for an internal licensing .
Is there a best practices document I can refer to formulate this?
I don't know much about this specific topic and I'm not aware of documents we may have covering this specific subject. Best would be to reach out to our support or deliverability teams who will surely have more precise information according to your client's needs and architecture.
Thanks Florentlb . This is not exactly we were looking it . I was looking to get guiding principles to recommend to a client . The number of ISPs he need to procure .
We have this document that lists some deliverability best practices: Managing deliverability
However I'm not sure it answers to what you asked. I guess that it would depend on some implementation and architecture requirements. Probably your deliverability contact should be able to help you.
Hope this helps,