Completely confused about cold email infrastructure - domain warming, mailboxes, and DNS setup
Hey everyone - setting up cold outbound for our early-stage startup (4 domains ready to go) and I'm hitting a wall trying to understand how all the pieces fit together. Non-technical founder here so apologies if these are basic questions.
Background:
We have 4 domains registered specifically for outbound and sitting in Cloudflare. Planning to launch cold outbound this summer. I've been told we need to "warm up the domains" before sending, use a tool like Instantly for campaigns, and figure out mailboxes. That's where I'm lost. My questions:
On domain warming:
What does "warming a domain" actually mean? Like what's happening mechanically?
When people say warm a domain, do they mean warming @domain (the domain) or warming name@domain (a specific mailbox)?
How does Instantly (or any warming tool) actually do this? What's the process behind the scenes?
If domain is just DNS sitting in Cloudflare, why does which mailbox provider I use even matter for warming?
On mailboxes and infrastructure:
Can I warm using one provider (like Zoho Mail - they're free for small businesses) and then switch to sending from Google Workspace once it's warmed? Does the reputation transfer?
Can the same email address exist on both Zoho and Google Workspace at the same time? Or can it only live in one place?
I keep hearing about providers like Winnr, Mailforge, etc. - what are these and how do they compare to just using Google Workspace?
If Winnr provides mailboxes AND has built-in warming, why would I still need Instantly?
On the technical setup:
We already added SPF, DMARC, and MX records to all 4 domains. Can someone ELI5 what SPF and DKIM actually do?
Can I start warming with Instantly before connecting actual mailboxes? Or does warming require live inboxes?
Why do I need to check existing DNS records before adding new ones? What breaks if I don't?
On doing this at scale:
This whole process seems incredibly tedious (set up mailboxes, warm each one for 2-4 weeks, configure DNS for each domain).
How do startups actually do this at scale without losing their minds?
For 4 domains doing cold outbound, how many mailboxes would you typically set up per domain?
Honestly just trying to understand the architecture here. Feels like there are 5 different tools doing overlapping things and I can't figure out which ones I actually need vs which are optional.
Any clarity would be massively helpful. Thanks in advance.