Q: mail: could not save changes - outgoing server list.

Using Mail 8.2, OSX Yosemite

I have more e-mail addresses set up in Mail. Job, personal, volunteering, etc. 7.

Some domains are hosted on the same server ( job e-mails).

While trying to solve the encryption problem (wanted to enable TLS certificate for the Outgoing Mail Server) in the Outgoing Server List, when Saving the new settings it hit me with this error:

"Could not save changes

The servers marked with alert icons are in conflict and cannot be saved. Two servers cannot share the same address and authentication settings. Resolve the conflicts and try again. "

The interesting thing is: There are no alert icons by any of the servers. What should I solve?