thunderbird设置问题

[xibei]

thunderbird新建邮件时签名的前面总是有两条短横线，而在回复时就没有短横线了，怎么把两个短横线去掉啊？
另外怎么设置不自动下载邮件的附件？

[xibei]

If you don't want a "-- " signature separator (the divider between the message body and the signature) use the config editor to change mail.identity.default.suppress_signature_separator from false to true. This requires Thunderbird 5.0 or later. If you are using Windows go to Tools → Options → Advanced → General and press the Config Editor button. Enter suppress_signature_separator in the Filter: field and press return. Find mail.identity.default.suppress_signature_separator in the results and double click on false in its Value column to toggle it to true, then close the config editor and press the OK button. [1]