帮楼主顶一下。我也遇到这个问题。我用的也是webeasymail,收发到国内的邮箱基本没问题,国外也有些可以,但最近有些地方,如俄罗斯、荷兰的邮箱收不到我们发过去的。我们接收他们的没问题。
对方还专门问了他们那边的邮件服务器管理员,答复如下:
Mail server set up with deviation.
> In our server there is a serve to check mail sender to avoid spam. In case
> with our server cannot check it. That is why it decide that mail is spam and
> delete it.