Direct Mail service limits
Limit | Description |
Number of email domains | 5 |
Number of sender addresses | 100. You cannot edit sender addresses, but you can delete up to 10 of them per month. |
Daily quota | Each Alibaba Cloud account has an initial daily quota of 2,000 emails. This quota is adjusted based on your sender reputation. |
Monthly quota | Daily quota × 30 |
Email tags | You can create a maximum of 500 email tags. Each tag is limited to 128 characters. |
Number of recipient lists | 10 |
Number of addresses in a recipient list | Up to 10,000, depending on your daily quota. |
Number of templates | 100 |
IP protection | 10 IP addresses or IP ranges |
Free email quota | Each primary Alibaba Cloud account gets a one-time free quota of 2,000 emails, usable at a rate of up to 200 per day. |
Data statistics | You can query real-time data statistics by sender address and email tag. |
Attachment size |
The total size of an email, including attachments, cannot exceed 15 MB. An email can contain a maximum of 100 attachments. The 15 MB limit applies to the actual total size of the email after the SMTP server processes it. Because Base64 encoding increases the original file size by 1.5 times or more, the final email size is larger than the attachment size on your client. Prepare attachments that are 8 MB or smaller. For large attachments, include a download link in the email body instead of attaching the file directly. |
Number of recipients supported per call | SMTP: 100 recipients API: SingleSendMail (100 recipients), BatchSendMail (1 recipient list) Console: 1 recipient list |
Console email template | Email subject: 256 characters Email body: 1 MB |
Console recipient list variables | The UserName variable is limited to 75 characters, but 50 characters or fewer is recommended. The NickName, Gender, Birthday, and Mobile variables are each limited to 25 characters. |
Data query | Data is retained for 30 days. |
Sending frequency | Refer to Email sending methods for details. |