There’s a bunch of best Guide/ best practices out there. Here’s a few of the top of my head.
-What you should do - Get SPF, DKIM & DMARC set up. (DMARC is the optional one but it’s good to have)
Configure your “Send to” address with a reputable and good domain. Make sure that website/domain reputation is not negative.
If you’re sending to a large amount of subscribers, make sure to do it slowly and in stages. Don’t send to all 100K subscribers (if you have 100k).
Announce in your email that this is a marketing email and that they can opt out anytime you want for the first few weeks and sends.
Get a Dedicated IP and warm it up properly.
I am not sure what you mean with configuring Mautic to limit shipping. Is it limit email sends? I can’t help you there. The best I’m doing now is just importing how many contacts I want and sending to that amount of contacts.
I recommend creating multiple segments.