There was a outlook issue with me.I'm using office 2011 for Mac.

When I want to sent a mail with large attachment (>5M), the mail will push into my draft folder automatically.I'm using exchange account, but I'm sure that was no issue with exchange server.Because I can sent the mail with large attachment by outlook 2010 in win 7.

So, I need your help.

Thanks a lot.

Looking forward your reply.