iCloud: Mail specifications

Mailbox Size

Your iCloud account includes 5 GB of free storage, which is shared by mail, documents, account information, and the iOS settings and app data that are automatically backed up by iCloud. You can also purchase additional storage.

Limits on Sending Messages   

iCloud has several safeguards to ensure that only iCloud members can send messages using the iCloud outgoing mail server. Among these safeguards are reasonable limitations on:

• The total number of messages you can send each day (200 messages)
• The number of recipients to whom you can send each day (1000 recipients)
• The maximum number of recipients per message (100 recipients)
• The size of incoming and outgoing messages (20 MB)

iCloud email has been designed primarily for personal use. Sending unsolicited bulk email messages through iCloud email servers is prohibited. To review the iCloud membership agreement and acceptable use policy, please see the iCloud Terms and Conditions.