New clients from businesses that have never heard of you.

Say what you sell and MastroSDR finds real businesses, then takes the contact address they publish on their own website. Nothing is guessed: if a business publishes no address, it is shown without one rather than given an invented info@ that will bounce.

Describe what you sell and MastroSDR proposes groups of businesses that would plausibly care, says why for each, and checks how many actually exist before you commit. A suggestion that turns out to contain four businesses is reported as too few to tell you anything, not presented as a plan.

Probably, if you give it nothing to work with, and MastroSDR will tell you so. Every draft is checked for the phrases people say make them delete without reading, and a batch is checked for being one template with a name swapped. That check argues against our own drafting step, which is the point: a tool that only ever tells you your output is good is selling you something.

Not until you say so. Every email waits for you in Review on a new workspace, and that is the setting nobody has to find or change. Full autopilot exists and is off. Turning it on is a deliberate switch in Settings, and it records who threw it and when. You can throw it back at any time. The only other way past Review is an API key you made yourself with sending ticked, revocable in one click.

It depends on where the email left from, which is worth knowing before you pick a mailbox. Send through your own server with IMAP on, or through a MastroSDR sending domain, and the reply comes back here. That person's follow-ups stop before the next one goes, and an address that bounces goes on the do-not-contact list. Send through a Gmail you connect and it does not. Google is asked for permission to send and never to read, so the answer stays in your inbox and you stop that cadence yourself.

Only a reply that clearly asks for time is answered. A question about pricing, a warm "sounds interesting", or anything the rules cannot place goes to you instead. MastroSDR reads past the quoted email underneath, so its own words asking for a call are never mistaken for theirs. MastroSDR offers times your calendar says are free, at most one a day, inside the hours you set. When somebody picks one, that slot is checked again before anything is written, because the customer may have booked something else in the meantime.

The switch is on by default for a new workspace, and on this deployment no meeting is booked whatever it says, so treat it as a preference rather than a feature. Booking needs two things at once: a calendar MastroSDR can write to, and a reply MastroSDR can read. No mailbox you can connect here carries both. Google is asked for permission to send and never to read, so a request for a time stays in your inbox for you to answer, and it is not asked for your calendar at all. Your own mail server is the other way round: replies come back over IMAP, and there is no calendar behind it. A reply asking for a time still reaches you in Replies with the words drafted; you put it in your own calendar. Every draft waits for you until you decide otherwise.

It is the thing this product is built around. Two things burn a domain: sending too much, and sending to addresses that no longer exist. MastroSDR caps both by default rather than leaving it to you to remember. Your daily limit is whichever is lower, the one you set or the one your mail provider enforces, so it cannot be talked into exceeding what Gmail allows. Every address is checked before a send is spent on it. Anyone who unsubscribes goes on a list nobody can take them off, including you. A bounce joins them wherever the mail comes back to MastroSDR: your own server over IMAP, or a MastroSDR sending domain. A bounce to a Gmail you connect stays in Gmail, so that one is yours to catch. And it refuses to send at all without a postal address and a working unsubscribe link.

Not to start. Connect the Gmail you already use, or your own mail server, including a business address on your own domain. Nothing needs buying to send a first message. A separate domain bought for outreach is the safer default from that first message, not something to add once volume picks up. A domain that gets marked as spam stays marked, and you would rather that was never the one your invoices go out from. Outreach only ever leaves through a mailbox or a domain you own.

Paid plans include a pool of drafts, so there is nothing to connect before you start. Past that, you use your own provider key and they bill you directly at their rates. Or you point MastroSDR at a model running on your own machine, and your prospect data never reaches a vendor at all. There is no per-word tier.

No. Your prospects, drafts and replies are yours. When you use your own key or your own machine, we never see the content at all.

In most places, for business to business, with conditions: a real postal address, a working unsubscribe, and honest headers. MastroSDR refuses to send without the first two and will not let you fake a reply thread. It is built for US recipients: the UK and the EU ask for consent before a commercial email, so any recipient MastroSDR can place there is refused at send time. Canada counts an address a company published on its own site as consent, so those go through and the rest are refused. Rules vary by country and this is not legal advice, so check what applies where your recipients are.