+ <li><a name="cust_main_invoice">cust_main_invoice</a> - Invoice destinations for email invoices
+ <ul>
+ <li>destnum - primary key
+ <li>custnum - <a href="#cust_main">customer</a>
+ <li>dest - Invoice destination: If numeric, a <a href="#svc_acct">svcnum</a>, if string, a literal email address, or `POST' to enable mailing (the default if no cust_main_invoice records exist)