You have a list of businesses you want to reach and a Gmail account. The question is how to email them without landing in spam, getting your account flagged, or spending every evening copying and pasting. Here is a setup you can finish today.
Step 1: Decide which account you will send from
Do not send cold email from the domain your existing customers and invoices rely on. If something goes wrong with reputation, you want it contained.
A practical setup:
- Register a second domain close to your main one (for example, yourbrand-mail.com or getyourbrand.com).
- Create a Google Workspace mailbox on it with a real person's name, like anna@getyourbrand.com.
- Forward the new domain's website to your main site so curious prospects land somewhere real.
A free @gmail.com address can send cold email, but it looks less professional and you cannot authenticate the domain yourself. Workspace on your own domain is the better choice for business outreach.
Step 2: Authenticate the domain
In your domain's DNS settings, add three records. Google's admin console walks you through each one.
- SPF: tells receiving servers Google is allowed to send for your domain.
- DKIM: generated in the Google Admin console under Gmail authentication, then pasted into DNS.
- DMARC: a simple starting record with a policy of none is enough to begin, and you can tighten it later.
Google has published sender requirements around authentication and easy unsubscribing, especially for higher-volume senders. Check Google's current sender guidelines and the email laws that apply where you and your recipients are. This is not legal advice.
Step 3: Warm up gently
A brand-new mailbox that suddenly sends a few hundred emails looks suspicious. Spend the first couple of weeks using it like a person: send normal emails to colleagues and friends, reply to threads, subscribe to a few newsletters.
Then ramp up slowly. A common rule of thumb is to start around 10 to 20 cold emails a day per mailbox and increase gradually, staying well below Google's sending limits. If you need more volume, add mailboxes rather than pushing one harder.
Step 4: Build and clean your list
Bad addresses cause bounces, and bounces hurt your sender reputation faster than almost anything else. Before sending:
- Remove duplicates, role addresses you do not want to hit, and obviously broken rows.
- Verify the emails. Decide what to do with catch-all addresses; this guide on catch-all emails covers when to send or skip.
- Make sure every row has the fields you will personalise with, like business name, city and first name.
The lead list cleaning checklist is a quick pass you can run on any spreadsheet, and if you are pulling data from several places, read how to clean a CSV before importing.
Step 5: Write a short, plain email
Gmail cold email works best when it looks like one person writing to another.
- Subject: short and lowercase-friendly, like "question about Smith Dental".
- First line: about them, not you. Mention their city, category or something on their website.
- Offer: one sentence on what you do and the result it brings.
- Ask: one easy question, like "Worth a quick chat next week?"
- Exit: a line saying they can reply "no thanks" and you will not write again.
Keep it plain text, skip images, and use at most one link. Avoid heavy tracking and attachments in the first email.
Step 6: Choose how to actually send
You have three realistic options.
| Method | Good for | Watch out for |
|---|---|---|
| Manual from Gmail | Under 20 emails a day, very personal notes | Slow, easy to forget follow-ups |
| Gmail mail merge add-on | Small batches from a Google Sheet | Follow-ups and branching often limited |
| Outreach tool connected to Gmail | Sequences, scheduling, reply handling | Must still respect volume limits |
If you go the tool route, GetClient lets you connect your own Gmail accounts and send campaigns from them, with merge tags like {{params.firstname}}, {{params.name}} and {{params.city}}, daily send limits by weekday, and a one-click unsubscribe link that skips opted-out addresses automatically. It also finds the leads (from Google Maps by keyword and city) and verifies them in the same place, so you are not exporting between three tools. New accounts get free credits; see plans and credits.
Step 7: Schedule, follow up and track
Send during your prospects' working hours, not yours. If your list spans regions, read up on time zones in cold email.
Plan two or three follow-ups spaced a few days apart, each shorter than the last and adding something new: a quick example, a question, or a polite close. If your tool supports branching, you can send a different message to people who clicked; the clicked link follow-up article shows how to write that one without sounding creepy.
Finally, keep an eye on bounces, replies and unsubscribes per campaign. If bounces climb, stop and re-clean the list before sending more. Reply to every response quickly, including the "not interested" ones, because real conversations are a healthy signal for your mailbox.
A quick checklist before you hit send
- Separate domain with SPF, DKIM and DMARC set
- Mailbox warmed up for a couple of weeks
- Verified, deduplicated list
- Plain email with one clear ask and an easy opt-out
- Low daily volume per mailbox
- Follow-ups scheduled in the recipient's time zone