Return personal MTA option

Notification message MTA options:  (RFC 2047 encoded string)
The  option specifies the personal name to use when the  MTA  generates postmaster messages,  e.g., bounce messages. By default, the MTA uses the string " ". The global  value can be overridden on a per-channel basis via the   channel option, which itself in turn can be overridden on a language-specific basis, via a language-specific     file  RETURN_PERSONAL option setting.

See also:
 * Notification message types
 * Notification message MTA options
 * return_address MTA Option
 * returnpersonal Option
 * DSN language and customization
 * Postmaster addresses