状态码
状态文本
意义


250
250 ok: Message ... accepted
调用成功，进入发送处理投递队列


550
550 Message was not accepted, invalid mailbox ...
收件人为无效地址，不处理发送


452
452 Too many recipients to the message ...
收件地址过多提示，不处理发送


550
550 Message was rejected, messages quota reached. Please retry later after recharge account
发送量及信用额度都已用完，不处理发送


550
550 5.7.1 Message rejected as spam by Content Filtering, containing "{敏感词}"
标题或内容包含有敏感词，不处理发送


550
550 5.7.1 Too many messages for this recipient. Please retry later
在一天内，同一个邮件地址接收邮件的数量大于5封（请联系客服可以调整），不处理发送。请在当日零点后，重新调用api发这封邮件


554
554 5.3.1 Maximum message size exceeded
发送内容太大 ，不处理发送


501
501 5.7.0 Authentication failed
api key（用户）或密码不正确


550
550 5.7.1 Service unavailable
拒绝访问，未开通api（smtp）服务


501
501 5.7.2 Invalid recipient, address must not exceed 60 characters near one@example.com, twoe@example.com
收件人地址超出60个字符限制


550
550 5.1.1 The recipient account that you tried to reach does not exist
收件人会员用户账户(uid)不存在


550
550 5.1.1 The campaign does not exist
触发规则不存在，不处理发送


500
550 Message was received but it could not be queued ...
内部错误，稍后请重试调用