Do you make any adjustments when emailing a survey to a very large # of recipients?

I understand from Qualtrics support it should be fully possible for me to email a survey invite to around 65K recipients (via loaded contact list) but given that I've never attempted to reach nearly so many I am still nervous there could be issues or unforeseen complications. If someone can quickly share some best practices and call out any known risks/implications for me that would be hugely helpful! Specific questions: 1. Do you do anything to split your large sends into batches (or do something else) to help with email deliverability? (Related .... Since this is a mass send, will it put me in jeopardy of getting the send-from email address blacklisted by recipient email servers? If so any way around this, e.g. splitting the send across a few different days or time blocks?) 2. If you send customer surveys and market research-type surveys from the same account, have you seen any negative impact to deliverability or response rate based on the occasional large sends? (I cannot do anything to damage my NPS response rate, so as a precaution I'm planning to at least use a different email address to send the large survey, but it will still be from the same domain and the same Qualtrics account. If anyone thinks there is still a risk here I might halt on sending the survey, or at least suggest significantly whittling down the # of recipients.) 3. Any other gotcha's or advice you have for me?