The mailbox is the product. Everything else is a draft.

A lot of “AI SDR” products are writers. They make copy. Then they ask you to paste it somewhere, or they send from infrastructure you do not control, with a from-name that is almost you. The demo looks like outbound. The headers look like a stranger. Buyers have become very good at strangers.

Gartner’s June 2025 survey of 632 B2B buyers found 69% reporting inconsistencies between what is on the vendor’s website and what the seller says. 73% actively avoid irrelevant outreach. 61% would prefer not to deal with a rep at all. An email from a shared blast domain, written by a model, signed with a name that is not quite a person, is three findings at once: it will not match the site, it will feel irrelevant, and it gives them a reason to stay in the rep-free lane they already wanted. The release is the argument. The mailbox is how you stop being the inconsistency.

Whose inbox, or it did not send

LeadHootz is opinionated. Campaign email sends from a connected Gmail or Outlook mailbox. LinkedIn is optional, for invites and DMs in the same sequence, not a second religion. SendGrid is optional volume after the domain is authenticated. The agent drafts. Your mailbox sends. Replies come back to Unibox, on the same identity you will one day sit on a call with. If the popup for Google or Microsoft never appears, allow pop-ups for app.leadhootz.com and connect again. This is boring. Boring is how inboxes get connected. Connect your inbox before anyone calls the workspace autonomous.

Gmail has already said what it will trust. Every sender needs SPF or DKIM. Once you are sending on the order of 5,000 messages a day to personal Gmail accounts, you need both, plus DMARC (a policy of p=none is the floor), alignment between the From domain and SPF or DKIM, and a user-reported spam rate that stays under 0.10% and never reaches 0.30%. That is their guideline, not a warmup thread. A clever sending subdomain you do not answer is not alignment. It is a costume, and costumes are what the 73% have learned to avoid.

When SendGrid is allowed

When a human mailbox’s daily cap is the actual bottleneck, and SPF, DKIM, and DMARC are done. Not because a dashboard looked more “enterprise” on a shared IP you have never heard of. Filters treat unknown infrastructure as unknown. Prospects reply to people. When something bounces, you should see it on the identity you are willing to defend. If your vendor cannot tell you whose mailbox just sent, you do not have outbound. You have a content tool with a send button. The longer version of the deaf-cadence problem is the sequence should die when they answer.

LinkedIn does not replace the inbox

Invites and DMs belong in the same sequence as the email so the story does not fork. A LinkedIn note that says one thing and an email that says another is the 69% inconsistency, split across two logos. They do not replace the inbox. The meeting still gets booked like a person books it: a real calendar, a real thread, a human who can hear “not now” and stop. Run website analysis before you draft, so the copy is the company on the site and not the last client’s voice. Sixty-nine percent of buyers are already checking.

Everything the model writes is a draft until a mailbox you own sends it and a person you employ is willing to answer it. If the product cannot do those two things, it is a notebook. Notebooks are fine. Do not let one call itself a sales team.