[TYPO3-dev] Basic markers for subscription plugins

[Tapio Markula]

Hi

I tried to get answer to this question in direct mail group, but nobody 
interested.

I would need information, where are defined basic markers for 
subscription plugins.

I would like to add some markers and redefine ###BACK_URL###, but I 
don't find, where it has been defined.

I would like to use hooks (if available) or XCLASS.

It is not defined in subcription plugins df_direct_mail_subscription or 
direct_mail_subscription.