Hi,
First let me know what’s kinds of your mail client. To resolve this problem, I would give you following suggestion to try:
Suggestion 1
Tweak the properties of the browser in the Browser Toolbar:
Tools -> Internet Options -> choose the Security tab
Click the Custom Level button
Enable the following settings:
Run ActiveX controls and plug-ins
Initialize and script ActiveX controls not marked as safe
Suggestion 2
Try to Delete the IE cache.
Suggestion 3
Re-register the IE 9 dlls. Go to the command prompt and type the following and press Enter after each line:
regsvr32 softpub.dll
regsvr32 wintrust.dll
regsvr32 initpki.dll
regsvr32 dssenh.dll
regsvr32 rsaenh.dll
regsvr32 gpkcsp.dll
regsvr32 sccbase.dll
regsvr32 slbcsp.dll
regsvr32 cryptdlg.dll
Suggestion 4
Reset IE settings