Comments by GaSui (Top 3 by date)

in my program setup, the host is smtp.XXX.com.cn, in the error info, the ip is correct, and one things, when I ping the smtp.XXX.com.cn, it not work (request time out). but the amzing problem is that i can use by the outlook and some other .net host. so i dn't know how to check.

Thanks.
yes, I have two server host, with the same send mail programe, one server work, the other one not work. so i think not because the mail server refused, and one things remind the two server in different language and place, may block the ip?