Mail delivery method, device and equipment and storage medium

The invention discloses a mail delivery method and device, equipment and a storage medium. Specifically, the method comprises the following steps: in response to a sending request which is triggered based on sending address information and carries a to-be-sent mail and receiving address information, determining the mail type of the to-be-sent mail according to the mail content of the to-be-sent mail; under the condition that the mail receiving address information indicates that the mail to be sent is an external domain mail, determining a mail receiving server and location information of the mail receiving server according to the mail receiving address information; determining a target proxy cluster from a plurality of regional proxy clusters corresponding to the mail type according to the location information; and sending the to-be-sent mail to the target proxy cluster, so that the target proxy cluster converts the proxy network address of the target proxy cluster into an authentication network address throu