Limit typeLimit
Messages per day
Daily sending limit*
2,000 (500 for trial accounts)
Messages auto-forwarded
Messages automatically forwarded to 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*
2,000 (500 external)
Recipients per message sent via SMTP (by POP or IMAP users) or the Gmail API
Addresses in the To, Cc, and Bcc fields of a single email. Includes email sent using smtp-relay.gmail.com or smtp.gmail.com*
100
Total recipients per day
Email addresses (recipients) count each time a message is sent; 5 emails sent to 10 addresses count as 50 total recipients.*
10,000
External recipients per day
Email addresses outside your primary domain, including domain aliases and alternate domains
3,000
Unique recipients per day
Each email address (each unique recipient) counts only once per day:
  • 5 emails sent to 10 different addresses count as 10 unique recipients*
  • 5 emails sent to a single address count as 1 unique recipient*
3,000 (2,000 external, 500 external for trial accounts)

*Applies to internal and external recipients

What also counts towards a user's limits

  • Mail sent from a user's alternate address, or alias
  • Mail an assistant sends on your behalf (if you delegate mail to an assistant)
  • Mail sent from Gmail’s vacation responder