# ACIAZ Postal Welcome to use the ACIAZ mail delivery service. You can add your own domain name and use this domain name to send letters. Both smtp and API methods are supported. There are no restrictions on the domain name and the number of letters sent. In order to use and maintain the delivery rate fairly, please consult the following principles ### Allowable matters * Send notification emails for registration, login, password change, etc. * Send promotional emails to existing users * Send promotional emails to website visitors ### Prohibited matters * Prohibit sending spam * Prohibit sharing accounts with others * Prohibit occupying the queue for a long time {% hint style="warning" %} ACIAZ Postal will accept complaints from email recipients and evaluate them. Violation of the above principles will result in a lower limit of the number of letters sent, or even ban account {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://postal.doxtex.com/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.