Manual:$wgNoReplyAddress

Email settings: $wgNoReplyAddress
Dummy address which should be accepted during mail send action.
Introduced in version:	1.5.0
Removed in version:	still in use
Allowed values:	(string)
Default value:	'reply@not.possible'

Other settings: Alphabetical | By Function

Details

Dummy address which should be accepted during mail send action. It might be necessary to adapt the address or to set it equal to the $wgEmergencyContact address, e.g.

$wgNoReplyAddress = $wgEmergencyContact;