the plugin Email to Confluence will discard attachement

[ttaoyuan]

i forward a mail(with xlsx attachment ) to confluence by "Email to Confluence",there 's 2way :

1. use the apple mail , works fine, the xlsx file will follow

2.use the foxmail or on the email web directly , the xlsx will discard ,and the page will only show the content without xlsx as attachment

how do i remove the restriction of attachment's file type  ?  

thanks a lot