How Many Emails per Day Is Safe From One Mailbox?
Google’s sending limits and sender rules, and the daily pace that keeps a mailbox in good standing when it writes to new business contacts.
Key takeaways
- Google’s hard sending limit is far above what is safe when you write to people who do not know you yet: the limit that matters is your reputation.
- Google asks every sender to authenticate their domain and keep reported spam low; large senders also need one-click unsubscribe.
- Send from a separate, authenticated domain rather than your main one, ramp up slowly, write each email to one person and stop as soon as they reply or opt out.
Table of contents
The hard limit is not the real limit
Google Workspace accounts can send up to 2,000 messages a day, and free Gmail accounts around 500. Those limits exist to stop abuse, not to tell you what is safe. A mailbox that writes to new contacts is judged on how they react long before it reaches any limit.
What Google checks
- Authentication: every sender needs SPF or DKIM on their domain; bulk senders need SPF, DKIM and DMARC. Check that all three are set for the domain you send from.
- Reported spam: Google asks senders to keep the spam rate reported in Postmaster Tools below 0.3%, and recommends staying under 0.1%.
- Unsubscribe: senders of more than 5,000 messages a day to Gmail must support one-click unsubscribe. Below that, a clear way to opt out still matters, and every opt-out has to be honored.
See who could buy from you
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Keep your main domain out of it
Your company domain carries your invoices, support and everyday mail. If outreach hurts its reputation, all of that suffers. That is why outreach usually goes out from a separate domain with its own authenticated mailboxes, warmed up before the first real email, while replies still reach the person who answers them.
A safe daily pace
There is no official number, so treat the following as a cautious practice rather than a rule. It is the pace Laplace x GTM uses for each sending mailbox.
| Period | Emails per day, per mailbox |
|---|---|
| First week | up to 12 |
| Second week | up to 20 |
| After that | up to 25 |
- Spread sends across the working day instead of sending in one burst.
- Send only to verified addresses: keep bounces under 2%.
- Count follow-ups and answers in the total, and stop following up as soon as someone answers.
What keeps you in the inbox
Mailbox providers learn from recipients. Emails that people answer, or at least do not mark as spam, earn the next ones a place in the inbox. That favors short, plain-text emails written to one person about one problem they plausibly have, with one clear question at the end, and a quick, respectful stop when someone says no.
