What is MailFactory for?

[Tim Stephenson]

Hi,

MailFactory is part of the MailetContext but what is it for? It seems
to me it could be achieved by the implementation of Mail. I am looking
for a convenient place to utility code that would produce a reply to a
message and am currently torn between these options:

    public Mail MailFactoryImpl.createReply(Mail mail)

or

   public Mail MailImpl.createReply(Mail mail)

Tim