To keep our systems healthy and your accounts safe, all Google Apps accounts limit the amount of mail a user can send. The limits restrict the number of messages sent per day and number of recipients per message. After reaching one of these limits, a user cannot send new messages but can still receive incoming email.
The following peak limits apply for Google Apps for Business or Education editions.
|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 IMAPusers)||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. Includes 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
The value of these limits may change without notice in order to protect Google’s infrastructure. Limits per day are applied over a rolling 24-hour period (rather than a set time of day).
Sending limits for Google Apps for Business trial users and new paid customers may be lower than those in the table above. If your domain has fewer than six users, it may take several billing cycles to reach peak limits.