Relative new user here, so apologies if this question seems vague!
We have need to try set email limits for specific lead partition in our org. Is this possible before I raise a ticket with our tech team?
Not that I'm aware of no.
Here's a similar idea that was posted a few months back: https://nation.marketo.com/ideas/2509#comment-38582
Not exactly sure of your use case, but you could always create an "Emailable" segmentation that uses the number of emails delivered in the past week an input for being considered a member of the emailable segment. The risk here is that if, for example, someone resets their password, that email gets counted towards the total.
Filter:"Emails Delivered This Week"
Operator: "At Most"
Value: Whatever your threshold is.
You'd create a segmentation in each of your partitions that has your threshold identified for that group, then you use that emailable segment as a qualifier for every email smart list you create.
Hope that makes sense!