Mail sending method and device

An embodiment of the invention discloses a mail sending method and device. The mail sending method includes: acquiring refuse-to-receive information used for indicating that mails are refused to receive; adjusting sending strategy of the mails according to the refuse-to-receive information; sending the mails according to the sending strategy after being adjusted. A mail sending server can indirectly acquire limiting rules, on the mails, of a mail receiving server by summarizing the refuse-to-receive information and analyzing the same in a classified manner, and then the circumstance that the limiting rules on mail receiving are violated by mail sending which is unexpected by mail sending and receiving parties can be avoided as much as possible by adjusting the sending strategy of the mails.