Email servers

ABillionLeads provides the data and the tools to do the email sending, but the actual sending is done on your own servers.

You can add any SMTP or MTA server to the list of servers used by our software to do the actual sending. Each server will be selected to send an email with an equal probability. So if you add 3 servers and send 30 emails, we will send 10 emails from each of the 3 servers.

You may add an unlimited number of email servers with each plan. Only you will use these servers for sending emails - we don't pool email servers.

Sending schedules

With ABillionLeads, you don't need any email warmup services. When adding a fresh server, we will warm it up using an extra cautious sending schedule, meaning we will send progressively more emails each day until we reach the maximum limit of 500 emails/server/day. After that, you will continue to send 500 emails/server/day undefinitely. If you stop sending emails, the warmup schedule will be restarted.

How to add a GMail server

If you are planning on sending 20k emails per month, 3 GMail smtp servers will do just fine for this target. Here is how to obtain the necessary details to connect your GMail account to our software:

Different SMTP methods in Gmail

There are three ways you can set up Google’s SMTP server:

  1. Gmail’s SMTP server

  2. SMTP relay service (for Google Workspace)

  3. Restricted Gmail SMTP server

In this guide we’ll cover the first one only.


  • The relay service is available for Google Workspace users (paid), and is used to send bulk emails such as newsletters, triggered/automated emails, or system emails as notifications.

  • The Restricted Gmail Server limits email sending to other Google Workspace or Gmail email addresses only.

The Gmail SMTP server:

  • No need for a workspace plan or paid subscriptions.

  • You will not be limited to sending to Gmail addresses, or ones within your organization (or using the same domain)

  • It’s just as secure and protected as the Google Workspace SMTP settings.

Additionally, it lets you forward emails through a Gmail alias if you’ve set one up.

How to use the Gmail SMTP settings?

Important notice if you’re using 2-Factor Authentication (2FA):

If you’ve enabled two-factor authentication on your Google account, you can use the SMTP server. However, you will need to generate an app password to allow another app to connect.

Skip this part if you haven’t enabled 2FA

To generate an app password:

Follow this link while logged into your Google account. (Go to your Google Account > Security > Signing in to Goggle > App passwords)

Follow the specific “How to use it” instructions provided by Google for each app and device, so you can grant access to your account.

Configure Gmail SMTP settings on your email client:

Adding your SMTP settings can be a different process depending on the app or email client you are using.Outlook and Thunderbird take different processes. But generally found in Account Settings / Outgoing Server.

Here are the Gmail SMTP settings you’ll need to input:

Gmail SMTP server address: Gmail SMTP name: Your full name Gmail SMTP username: Your Gmail address Gmail SMTP password: Your Gmail’s login password Gmail SMTP port (TLS): 587 Gmail SMTP port (SSL): 465

If asked:

Requires SSL: Yes Requires TLS: Yes Requires / Use authentication: Yes Requires / Use secure connection: Yes

Other email clients, and other apps might have different setup process. Make sure go over specific guides to configure Gmail’s SMTP settings.

Now that you’ve set up your outgoing server, you can send emails from your newly configured app. Copy the values into the form, using lowercase. A confirmation will be issued if our systems can connect to your email server.

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