I'm trying to send emails to a company in China and the mail is unable to get delivered. In MS exchange 2003 STD i get a message stating the 'the connection was dropped by the remote host.'
I telnet into there server and got the following error message. ' 553 Email wa rejected by 35 AntiSpam, id=mail.mail172.cn4e.com.14458.1246858394' This is after using the helo Domain.com, mail from:firstname.lastname@example.org
553 Email wa rejected by 35 AntiSpam, id=mail.mail172.cn4e.com.14458.1246858394' .
The problem is my domain is not blacklisted any where that i can see. My domain is Freyssinet.com.au. I only have this problem to CN domains that i'm aware of.
To get around this, i setup my Exchange to use my ISP SMTP server as a smart host and the emails get sent successfully, but this is not a suitable option. Any help will be great.