Google Workspace: Gmail Sending Limits

Limit Type	Description	Limit
Messages per day	Daily sending limit*	2000
Messages auto-forwarded	Messages automatically forwarded from another account; not included in the daily sending limit	10,000
Auto-forward mail filters	Account filters that automatically forward mail	20
Recipients per message	Addresses in the To, Cc, and Bcc fields of a single email*	2000 (500 external)
Recipients per message (sent via SMTP by POP or IMAP users)	Addresses in the To, Cc, and Bcc fields of a single email*	99
Total recipients per day	Individual addresses count in every mail sent; 5 emails sent to 10 addresses count as 50 recipients*	10,000
External recipients per day	Email addresses outside your primary domain, including domain aliases and alternate domains	3000
Unique recipients per day	Individual addresses count once a day; 5 emails sent to 10 addresses count as 10 unique recipients*	3000 (2000 external)

*applies to both internal and external recipients

These limits are also shown on Google's Support Site

Important: If you need to utilize email as a marketing campaign, we recommend that you consider using Constant Contact.