Create sending subdomains

Add the standard hosts, or your own

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1. Step 1Open SubdomainsSettings → Domains, then the Subdomains tab. Every apex you own gets a card. MANUAL DNS means you publish each host's records yourself.
2. Step 2Create the standard setCreate missing adds every standard host that is not there yet — updates, news, notify, mail, send and broadcasts — in one press.
3. Step 3Or add one hostAdd host on a single tile creates just that one. updates is the usual campaign and inbox host; start there if you only need one.
4. Step 4Add a custom labelType a label such as promo and press Add custom host. It sits under Custom hosts, marked pending, until it verifies.
5. Step 5Publish, then wait for ConnectedEach host has its own SPF and DKIM. On Verify domain, press the globe on the host row, publish those records, then refresh until the tile turns green.