Header

Name	Type	Additional information
subject	string	None.
trans__group__name	string	None.
to	Dictionary of string [key] and string [value]	None.
from	Dictionary of string [key] and string [value]	None.
reply_to	Dictionary of string [key] and string [value]	None.
cc	Dictionary of string [key] and string [value]	None.
bcc	Dictionary of string [key] and string [value]	None.