Issue when sending email with big attachment

[sameh.selim]

Hi,

Weird issue here as when i try to send any email with a big attachment file the page keep loading forever while the mail already sent, but the page is not redirecting again to the inbox page.

I noticed that when using a high speed internet connection sometimes it works fine, but always happen when using a slow internet connection.

My roundcube is hosted on a windows 2008 server 64bit with IIS7.5 and PHP Version 5.2.6

any ideas about this issue please?