Mailboxes for Smartlead
Smartlead Mailboxes: Add Google Email in Minutes
To add Google email to Smartlead, click + Connect Mailbox in Email Accounts and sign in with Google OAuth, or use SMTP with an app password. Jetmail sets up the mailboxes and connects them all to Smartlead in one click.
- [email protected] Connected
- [email protected] Connected
- [email protected] Connected
Connection methods
Ways to put Google email in Smartlead
Smartlead mailboxes can be connected four ways. Here's what each needs, from Smartlead's help center (October 2026).
| Method | How it signs in | What it needs | Adding many |
|---|---|---|---|
| Google OAuth (Smartlead's Infrastructure) | Google sign-in, no password stored | Click Allow on every permission screen | Sign in per mailbox |
| Google OAuth (Your Email Network) | Your own Google OAuth app | Smart or Prime plan | Sign in per mailbox |
| SMTP + IMAP | App password | 2-Step Verification, then a 16-character app password | CSV upload |
| Outlook (Microsoft 365) | Microsoft sign-in | Authenticated SMTP and IMAP enabled by an admin; wait 20–30 minutes | Not available |
| Jetmail | 1-click OAuth from Jetmail | Nothing: DNS and mailbox settings done for you | All mailboxes at once |
Step by step
How to add Google email to Smartlead
OAuth is the quicker and sturdier route. Use an app password only if OAuth isn't an option for your Workspace.
Step 1
Email Accounts
Open it from Smartlead's left sidebar.
Step 2
+ Connect Mailbox
Top-right corner of the page.
Step 3
Pick Google OAuth
Under Smartlead's Infrastructure.
Step 4
Allow access
Sign in and accept every permission screen.
Step 5
Connected
Smartlead verifies the mailbox and marks it Connected.
Or connect with an app password (SMTP)
- Turn on 2-Step Verification in the Google account's Security settings.
- Create an app password (Mail, custom name "Smartlead") and copy the 16 characters.
- In Smartlead, add the account and enter the address, the app password and these server settings, then test the connection.
Google SMTP and IMAP settings for Smartlead
SMTP host smtp.gmail.com port 465 SSL on
IMAP host imap.gmail.com port 993 SSL on
Password <16-character app password>Same mailboxes in Instantly? See Instantly mailboxes. Full SMTP reference: Gmail SMTP settings.
Smartlead email warmup
Smartlead warmup settings
Smartlead's help center and its API guide give slightly different numbers. Both are below so you can pick a range.
| Setting | What it does | Help center | API guide |
|---|---|---|---|
| Total daily emails | Warmup emails per day | 10–20 while the mailbox runs a campaign | 20–40; not above 40 for new accounts |
| Daily Ramp up | Raises warmup volume each day | On for fresh domains, off if already warm | 2–3 more per day |
| Reply Rate | Share of warmup emails that get replies | 20–30%; above 30% not advised | 30–40% |
| Randomise Warmup numbers | Varies daily volume between limits | Optional | Not covered |
| Warmup length | Time before the first campaign | Not stated | 14+ days; 21–30 for newer domains |
Skip the 2–4 week warmup
Sizing
How many mailboxes each Smartlead plan needs
Smartlead includes unlimited email accounts on every plan, but each plan caps monthly sends. At about 30 cold emails per mailbox per day over 22 sending days, this is what it takes to use the full allowance.
Mailboxes needed to use each plan's monthly sends
Smartlead send limits from its pricing page (October 2026). 30 sends per mailbox per day, rounded up.
| Base (6K) | 10 |
|---|---|
| Pro (90K) | 137 |
| Smart (150K) | 228 |
| Prime (500K) | 758 |
| Smartlead plan | Smartlead / month | Sends / month | Mailboxes | Domains | Jetmail / month* |
|---|---|---|---|---|---|
| Base | $39 | 6,000 | 10 | 4 | $39 |
| Pro | $94 | 90,000 | 137 | 46 | $410 |
| Smart | $174 | 150,000 | 228 | 76 | $683 |
| Prime | $379 | 500,000 | 758 | 253 | $2,273 |
*Standard Jetmail mailboxes, cheapest plan for that count, billed monthly. Domains billed separately.
Alternatives
Smartlead email alternatives for mailboxes
You have three ways to get mailboxes into Smartlead: buy them in Smartlead's SmartSenders marketplace, create them yourself in Google Workspace or Microsoft 365, or use an infrastructure provider like Jetmail that handles domains, DNS and the OAuth connection. The last option keeps the domains in your name, so the mailboxes move with you if you switch sending tools.
Comparing sending tools too? Read the best cold email software, or see how the whole setup fits together in cold email infrastructure.
Sources: Smartlead pricing · Smartlead: connect your mailbox · Smartlead: Gmail with SMTP · Smartlead: Outlook via OAuth · Smartlead: bulk add accounts · Smartlead: enable warmup · Smartlead API: warmup guide
Get a free Smartlead mailbox plan
Tell us where to send it. We'll reply with mailbox, domain and DNS recommendations for your sending volume — or start right away and have mailboxes live in minutes.
Where should we send it?
Or see pricing →Frequently asked questions
How do I add a Google email account to Smartlead?
Open Email Accounts, click + Connect Mailbox, choose Smartlead's Infrastructure and pick Google OAuth, then sign in and click Allow on every permission screen. You can also connect over SMTP and IMAP with a Google app password.
Should I use OAuth or an app password for Google in Smartlead?
OAuth. Smartlead's own help center notes that Google recommends OAuth because no password is stored and the connection is less likely to break when security settings change. App passwords also require 2-Step Verification on every account.
Can I add mailboxes to Smartlead in bulk?
Yes, for SMTP accounts: Smartlead accepts a CSV upload in its sample format and flags rows with errors before importing. Its help center says bulk upload of Outlook accounts isn't available. Jetmail connects Google and Microsoft mailboxes to Smartlead by OAuth in one go.
How does Smartlead email warmup work?
Enable warmup on a mailbox and Smartlead exchanges warmup emails with its warmup pool. You set total daily warmup emails, an optional daily ramp-up for fresh domains, and a reply rate. Smartlead's API guide recommends at least 14 days of warmup, and 21–30 days for newer domains.
Is Smartlead warmup free?
It's included in every Smartlead plan as of October 2026, with no per-mailbox charge. The warmup pool tier depends on the plan: Foundation on Base, Growth on Pro and Premium on Smart and Prime.
What's the alternative to buying mailboxes inside Smartlead?
Bring your own Google Workspace and Microsoft 365 mailboxes from an infrastructure provider. Jetmail sets them up on domains registered to you, with SPF, DKIM and DMARC, and connects them to Smartlead or 50+ other tools with 1-click OAuth.