# Official use

# Preparation

Before formal use, please make sure to create another domain name and API_ USER, do not use the test domain name and API_USER.
Estimate your own sending volume and purchase the sending volume of e-mail
Sendcloud has a limit on the sending quota for each account. For details, please refer to request quota of the day. If the quota cannot meet the business needs, please contact customer service

To pay attention to the overall statistical data sent, please use [ delivery statistics ](/instructions/analytics/# delivery-statistics )
To pay attention to the sending data of each email, please use status
To pay attention to the time-consuming situation of triggering mail delivery, please use duration
To pay attention to the tracking data of sending effect, please use statistics / tracking statistics , settings / tracking, [data / tracking](/instructions/ data/#tracking)
For complaint unsubscribing information, please use data / complaint and data / unsubscribe

How to improve the transmission efficiency and effect can be seen in the following points:

Trigger and bulk mail under the same domain name, do not send mixed
Reduce the situation that email address does not exist and format error
Don't violate the rules and regulations, don't fabricate the contents of e-mail, and don't use the same contents repeatedly
There are more optimization schemes for s +, which can be opened on demand