Manual talk:$wgPasswordSenderName
From MediaWiki.org
In 1.18 this new variable seems to implemented in a way that may break sending emails over an external SMTP which is validating the user account. This is true even if the variable is not set. The only workaround we found is to set this variable to an empty string. G.Hagedorn 08:38, 2 September 2011 (UTC)
