Do I need to re-warm up my IP when changing domain extension?

Email marketer from Postmark explains that any significant change to your sending setup, including a new domain, even just the extension, requires a warm-up to ensure deliverability isn't negatively impacted.

Marketer from Email Geeks responds that it's technically still a brand new domain with zero reputation as far as the recipient mailbox providers will be concerned. Assuming that you're changing everything to go with it, then yes you should warm it.

Email marketer from ActiveCampaign responds that you must warm up a new IP address, or a new sending domain. If only the TLD is changed, treat it as a new domain to ensure you get the best deliverability possible.

Marketer from Email Geeks shares they can't see anyone implementing filtering that would aggregate different TLDs. Maybe manually for large known systems, they'd probably aggregate all the different google/yahoo/aol/hotmail TLDs for example, but that's it.

Email marketer from Mailjet Blog explains that when switching to a new domain extension, it’s treated as a new domain. Therefore, a warm-up is necessary to build a positive reputation with ISPs.

Email marketer from StackOverflow comments, yes, you should treat it like a new domain, even with just a TLD change. Mailbox providers look at the domain as a whole, and a new extension resets the reputation.

Email marketer from Customer.io explains that if you have a new sending domain – even if it's just a different TLD – you'll need to warm your domain and IP address. Without a warm-up period you risk tarnishing your sender reputation.

Email marketer from SendGrid responds that a domain change including the extension necessitates a warm-up strategy. It's viewed as a completely new entity by mailbox providers, requiring you to establish trust.

Email marketer from Reddit comments that changing TLDs, is effectively the same as moving to a completely new domain from a reputation standpoint, necessitating a proper warm-up strategy.

Email marketer from Email on Acid article shares that, like with a new IP, a new domain (even with only a TLD change) needs a warm-up period to establish trust with ISPs. Start slow and gradually increase volume.

Email marketer from GlockApps shares that both new IPs and new domains require warming. A new domain extension would also fall under this category, as it's treated as a new sending identity.

Email marketer from Litmus blog shares that new domains require careful setup and authentication. This includes the extension; any change should be treated as a new domain requiring a warm-up phase.

Expert from Email Geeks shares if a human puts eyeballs on it they might make a connection, but automations isn't even going to try. There are much more reliable ways to cluster mailstreams.

Expert from Word to the Wise advises, generally treat a new sending domain as a new sending domain, this includes just changing the TLD and you should implement a new sending strategy for this and follow all email authentication and setup advice.

Documentation from Microsoft describes that when you change your domain (including the extension) you need to re-establish sender reputation. They treat this as a brand new sending domain.

Documentation from Google Postmaster Tools states that new domains, including those with different extensions, have no sending history. You must build a positive reputation over time by consistently sending authenticated email.

Documentation from SparkPost describes that new domains or changes to existing domains (even just the extension) require a ramp-up period to build a positive sender reputation with mailbox providers.