Hi Huakaibird, Make sure your email is in plain text format. HTML message is likely to trigger a high spam score. Hope this helps.
Regards, Eric On 3/2/10 11:51 PM, "华凯" <huakaib...@163.com> wrote: > why always SMTP error, DOT: 552 spam score (5.0) exceeded threshold when > sending mail to the mail list > > >