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Limits for Amount of Mail Sent in Gmail - Knowledgebase / Email and Collaboration / Email - OIT Service Center

Limits for Amount of Mail Sent in Gmail

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The following content was taken from Google Support Article: Sending Limits 

Limit type Description Business/ 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, 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)
Recipients mailed with a Google Apps Script Seen in the article Quotas for Google Services 1500
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