E-Mailing a SharePoint group returns blank page

Hi Guys, Need your help.

Environment: Sharepoint 2010 with SP1

We have an issue with Actions->Email users. Can’t send email to more than 20 users. No message like to many addresses, just blank page and outlook client is not opening. This issue was detected on client with Win7+IE9+Outlook2010. There is no issue on clients with XP+IE8+Outlook2010 and no issues on Firefox on Win7 as well. All  that I found is limitations for URI 2089 ch. , but this limitation is on all IE browsers, starting from IE5 and up. Also tried to change compatibility view to 7, 8, but didn’t help. 

Here are well described issue as other have same: http://social.technet.microsoft.com/Forums/sharepoint/en-US/efe13d71-15b5-4c6e-85e2-0eeff1477d53/emailing-a-sharepoint-group-returns-blank-page http://sharepointknowledgebase.blogspot.ca/2011/11/email-users-action-not-working.html

Also I tried to debug in browser and find script where this limitation is checked

function  BtnEmailClick(viewId) {ULSJyi:; var emails = GetSelectedUsers(viewId, “email”, “;”); if (emails.length == 0) { alert(noUserEmailSelectedMsg); return false; } emails =”mailto:” + escapeProperly(emails); if (emails.length > 2083) { alert(tooManyUserEmailSelectedMsg); return false; } window.location = emails; return false; }

I put break point to check emails.length, everytime was less then 2083.

Please share you ideas. Thank you!!