Address of the target address list (to which members are added). Optional if mailListName is provided; must belong to the calling account, otherwise 40517.

Alternative to address: locate the target list(s) by list name. Used only when address is blank; must match an existing list of this account (40517 otherwise). If several lists share the name, members are inserted into all of them.

Email addresses to add (separated by semicolons, supports batch addition). At most 1000 per request (40515); each entry at most 127 characters. Invalid entries are skipped and reported in invalidAddressList/reasonList.

Member names separated by semicolons. Count must equal members count (40528); each name at most 127 characters (invalid ones only flagged in reasonList).

Substitution variables corresponding to members, formatted as {"money":"1000"}; separated by semicolons (a variable value containing semicolons is tolerated by brace matching). Count must equal members count (40521); each JSON object at most 2048 characters and must be valid JSON, otherwise the member is skipped with a reason (not a request-level failure). The keys "name" and "recipient" are dropped from vars.