I have Send Us permissions for several users. All of them work OK except one the admin person. His name is John and he has a JohnT profile. I setup Send as permissions on the Security Tab of the user John so JohnT has Send-us permissions. After a while this setting disappeared.
What could be the problem? Why it remembers all of them except John? He is the admin person and it is likely that he setup some other policies that cause this issue.