Why doesn't exel send attachments directly?

Question

excel

Excel does not send attachments directly. When sending via file>send>email>
Error occurs: Mail system failure. Close Microsoft excel, restart your mail system and try
Office 2010 again.
Outlook is the default. Yesterday everything worked fine, today this error.

Answer 1

In general, colleagues, I also encountered this trouble. An employee has office standard 2010. The following thing began to appear: "Mail system failure. Close Microsoft excel, restart the mail system and try again"
An attempt to reinstall the office did not lead to anything. The error persisted. It is noteworthy that if you log in with a different account, then this error does not exist.
Has anyone solved this problem acre rollback to the previous version of the office?