Gmail officially claims that with a regular Gmail account you can send 500 emails/day and with a G Suite account you can send 2,000 emails/day (details are here). So, if you’re a G Suite user, you can send a 10,000 recipient campaign: MailKing and Gmail Auto Follow Up will evenly distribute the campaign at 2,000 emails/day for 5 consecutive days.

However, Google throttle the number of emails a particular account can send based on a variety of factors, including:

  • How old the particular Gmail or G Suite account is (the older, the better)
  • How many conversations exist in the account (may existing conversations are better)
  • Whether the account has sent mass emails before (if it has, then you’re better off)
  • The content of the mass emails (non-spammy content)
  • The bounce rate of the overall account (the lower the better)
NOTE: If Google detects that you are sending abuse or phishing emails, they might terminate your Gmail account and all associated accounts. You will not be eligible for a refund.

We don’t have exact rules on how Google decides how many emails an account can send at a particular time, but here’s what we’ve observed:

  • A brand new Gmail account (ending in @gmail.com or @googlemail.com) with no history has a very limited sending ability. Sometimes you are limited to 10 emails right when the account is created.
  • A brand new G Suite account, where the organization itself is new to G Suite, also has a very limited sending ability.
  • A brand new G Suite account, where the organization has a history with G Suite, can send near the 2,000 emails/day limit almost right away.
  • If a large number of emails are marked as phishing or abuse you might have a very limited sending ability.
  • If Google detects that you are sending abuse, illegal, or phishing emails, they might terminate your account and all associated accounts