https://mandrill.zendesk.com/hc/en-us/articles/205582187-Can-I-configure-Postfix-to-send-through-Mandrill-
本作品采用创作共用版权协议, 要求署名、非商业用途和保持一致. 转载本站内容必须也遵循署名-非商业用途-保持一致的创作共用协议.
https://mandrill.zendesk.com/hc/en-us/articles/205582187-Can-I-configure-Postfix-to-send-through-Mandrill-