[feat] Client IP in Email log (outgoing smtp)

It would be very useful to see the connecting client IP of authenticated emails in the Email log view.

May be location too, or button to find lhe location using one of the many IP2location free services. ;)

Anorher feature could be restricting connections for outgoing emails based on Country (per alias or per domain).

No files or tests are identified. Start by locating the outgoing SMTP authentication flow and the Email log view, then confirm whether the scope is client IP only or also location lookup and country-based restrictions; done means the agreed information or controls are visible and covered by tests.

Written by the indexing model from the issue text.