SMTP error, RCPT TO: 550 #2175041 unavailable mail user
发布时间：2013-11-27 17:47:02
| 错误代码 | SMTP error, RCPT TO: 550 #2175041 unavailable mail user. |
| 形成原因 | 此退信是收件方服务器退回。 |
| 解决办法/流程 | 建议和收件方确认以下几个信息：
1.这个域的mx指向是否正确，正确的情况下确认以下第二点。
2.收件账号是否存在，存在的情况下确认以下第三点。
3.收件账号是否处于过期或禁用状态。 |
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