'email' => email to look up the avatar for
'url' => the (string) generated URL of the avatar
+**'emailer_send_prepare'** - called from Emailer::send() before building the mime message
+ $b is (array) , params to Emailer::send()
+ 'fromName' => name of the sender
+ 'fromEmail' => email fo the sender
+ 'replyTo' => replyTo address to direct responses
+ 'toEmail' => destination email address
+ 'messageSubject' => subject of the message
+ 'htmlVersion' => html version of the message
+ 'textVersion' => text only version of the message
+ 'additionalMailHeader' => additions to the smtp mail header
+
+**'emailer_send'** - called before calling PHP's mail()
+ $b is (array) , params to mail()
+ 'to'
+ 'subject'
+ 'body'
+ 'headers'
+
A complete list of all hook callbacks with file locations (generated 14-Feb-2012): Please see the source for details of any hooks not documented above.