Direct Mail enforces limits on email domains, sender addresses, daily quotas, and attachments.
Limits
|
Item |
Description |
|
Email domains |
5 |
|
Sender addresses |
100. Cannot be edited. Up to 10 can be deleted per month. |
|
Daily quota |
2,000 emails per account by default. Adjusted based on credit rating. |
|
Monthly quota |
Daily quota × 30 |
|
Email tags |
Up to 500. Each tag is limited to 128 characters. |
|
Recipient lists |
10 |
|
Addresses per recipient list |
Up to 10,000. The actual limit also depends on the daily quota. |
|
Templates |
100 |
|
IP protection |
10 IP addresses or IP address segments |
|
Free email quota |
2,000 free emails per account in total. Up to 200 per day. |
|
Data statistics |
Real-time query by sender address and email tag. |
|
Attachments |
Supported only for SMTP. The console and API do not support attachments. Maximum total email size: 15 MB. Up to 100 attachments per email. The 15 MB limit applies to the total SMTP payload. Base64 encoding increases size by at least 1.5x, so keep attachments under 8 MB. For larger files, use hyperlinks instead. |
|
Recipients per call |
SMTP: 100 recipients API: SingleSendMail (100 recipients), BatchSendMail (1 recipient list) Console: 1 recipient list |
|
Console email template |
Email title: 256 characters Email body: 1 MB |
|
Console recipient list variables |
`UserName`: 75 characters (50 or fewer recommended). `NickName`, `Gender`, `Birthday`, `Mobile`: 25 characters each. |
|
Data query |
Data is retained for 1 month. |
|
Sending frequency |