Does ZipLead check the emails it finds against a mail server?

No, and it is worth being clear about it. Addresses come off the business's own website, and likely owner addresses come from public-record names with a certainty word attached. Nothing is verified against a mail server. If your sending reputation matters, verify the list yourself before you send.

Is it legal to cold email a business in the US?

Commercial email rules apply to business to business email with no exemption, so you need a real sender identity, a physical address, an honest subject line and a working opt-out. State rules can be stricter. Read the actual requirements rather than taking a vendor's word for it.

Are info@ addresses worth emailing?

At a local business, often yes. A shared inbox at a small company is read by a person who is supposed to read it. At a larger company it goes nowhere. Judge it by the size of the business, not by the shape of the address.

How to find a local business email address

How to find a local business's email address without guessing: where businesses actually publish them, why a shared inbox often beats a personal one locally, and what unverified addresses cost you.

THE SHORT ANSWER

Look on their own website first, because most local businesses publish an address on the contact page, in the footer, or on an about page, and that one is real. If there is nothing published, the next honest step is a likely address built from a name on a public record, clearly treated as likely, because a guessed address that bounces damages the reputation that gets your other email delivered.

Where local businesses actually publish an address

The contact page. Most common by a wide margin.
The site footer, often as a plain text address to dodge scrapers.
The about or team page, sometimes with a person's name attached.
A booking or quote form's confirmation text.
Facebook and Instagram business profiles, which have a contact field a lot of businesses fill in and then forget.

You will mostly get shared inboxes: info@, office@, hello@, contact@. For a local business that is usually fine and sometimes better. At a twelve-person HVAC company the shared inbox is read by somebody whose job is reading it, which is more than you can say for a cold email to an owner's personal address.

What unverified addresses cost

This is the part worth understanding before you buy any tool. Email providers judge your sending domain partly on how many of your messages bounce. Send a batch of guessed addresses, collect a pile of bounces, and your legitimate email starts landing in spam folders, including email to people who asked for it. The damage outlasts the campaign.

So the order that matters is: published addresses first, likely addresses second and flagged as likely, guessed addresses never. And if you are sending at any volume, run the list through a verification service before you send. That is a different product from a lead tool, and anyone who tells you their finder makes verification unnecessary is selling.

One more thing that gets skipped: US commercial email rules apply to business to business email too. There is no B2B exemption. A real sender address, a real physical address, an honest subject line and a working unsubscribe are the baseline, whoever you are writing to.

How ZipLead does it

ZipLead reads the business's own site, the homepage, contact, about and team pages, and reports the addresses it found there. It does not invent an address from a pattern, and it does not call anything verified.

Emails from the business's own pages, with the page they came from noted on the lead.
Who runs their email, read from DNS: Google Workspace, Microsoft 365, or nobody at all. Useful for guessing how a message will be treated, and for anyone selling email or IT services.
A likely owner email built from a name on a public record, printed with the finder's own certainty word. Never from a name scraped off a page.
An exclusion list so your own customers never show up in a search or an export.
Export a CSV with 38 columns, or push to HubSpot in one click.

What ZipLead does not do here

Every one of these is a real gap rather than a hedge. If one of them is the thing you actually need, ZipLead is the wrong buy for this job and it is cheaper for both of us if you know that now.

ZipLead does not verify email addresses. Nothing is checked against a mail server, and every stored address should be treated as unverified. Verification is a separate product and worth buying if you send at volume.
It finds what is published. A business that publishes no email address gets none, unless a public record names a person and a likely address can be worked out from that.
It does not append work emails from a third-party contact database, so you will get shared inboxes more often than named people.
It does not send email. No sequences, no inbox, no sender rotation. Export and use your own tool.