Land in the inbox, not in spam.

For Google and Microsoft accounts you create an app password — a separate, revocable credential scoped to IMAP/SMTP access — rather than your real password. The connect flow walks you through it per provider. Every credential is encrypted with AES-256-GCM before it touches our database, is never logged, and is never returned by any API. Disconnecting a mailbox destroys its credentials immediately.

Honest answer: some providers restrict automated mail activity, and we won't pretend otherwise. Ember stays deliberately conservative — low hard-capped volumes, human-like cadence inside business hours, no anti-abuse circumvention — and you must only connect mailboxes you own or are explicitly authorized to manage. Read your provider's terms, and read our acceptable use policy, which we actually enforce.

Reputation builds on the provider's schedule, not ours. Most fleets see placement improve over 2–4 weeks of steady ramping; a brand-new domain can take longer. We won't promise a date and we won't promise an outcome — anyone who does is guessing on your behalf.

Only warmup threads — messages carrying our X-Ember-Id header — and the folder each one landed in (inbox, spam, promotions). That folder placement is the entire measurement. We never read, store, or analyze the content of your real correspondence.

No. Warmup emails travel exclusively between mailboxes connected to your own fleet — mailbox A writes to mailbox B, B replies to A. No outsiders receive anything. Ember is not a cold-email sender and has no recipient lists to send to.

At least two. Warmup works by exchanging mail between mailboxes in your fleet, so a single connected mailbox has no peer to talk to — the app tells you this plainly and suggests connecting a second instead of faking activity.

They're estimates from your warmup pool: we measure where warmup messages land across the mailboxes you've connected. That correlates strongly with how providers treat your real mail, but it isn't a third-party seed-list test and we label it accordingly everywhere in the product.

Yes. Billing is handled by Polar, our merchant of record — cancel in one click from the customer portal and keep access until the end of the period you paid for. The 14-day trial needs no card at all, so there's nothing to cancel if you just want to look around.