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原帖由 gandu 于 2010-10-28 22:53 发表 ![](http://www.oursteps.com.au/bbs/images/common/back.gif)
一般smtp server 只允许relay 他们自己ip 的email,如果不是就变成 open relay server, 任何人都可以经过这台server 发email 了(也有例外的, 如通过认证后可以发) 。 你现在用其他公司上网 (如 tpg, telstra) , pacific.net ...
and ping does not prove that SMTP is serving. do this:
telnet smtp.xxxx.com 25
if you see a session established, try
helo
it should say hello back to you. then you know it's serving.
but then, they may still restrict by authentication/ip/domains etc, so you will never know. |
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