Domain Alignment on Shared Network

What it is

This one lets you configure a custom return-path domain for each of your email sending domains, so marketing emails can pass strict authentication policies while still sending over the shared network. With a custom return-path domain, your sending domain aligns with your From address, which strengthens authentication and improves deliverability. It also sets up future capabilities like BIMI, which displays your brand logo in recipients' inboxes. This is in public beta for Marketing Hub Enterprise.

Why it matters

Authentication is one of the strongest signals inbox providers use to decide whether to trust you, and the requirements keep getting stricter. For teams sending to high-scrutiny audiences, healthcare and financial services come to mind, this is the kind of infrastructure update that decides whether an email lands in the inbox or the void. It is narrow in tier reach and a little technical to wrap your head around, but if deliverability is a recurring fight for you, it is worth understanding.