[MlMt] incorrect From:

[Randy Bush]

i have

    ryuu.rg.net:/Users/randy> defaults read com.freron.MailMate MmDefaultBccHeader
    {
	"from2 at arrcus.com" = "bcc2 at arrcus.com";
	"from at psg.com" = "bcc at psg.com";
    }

when i am in the arrcus.com INBOX and c(ompose, the compose window shows
that the message will be "From: randy at arrcus.com"

but the received message is "From: randy at psg.com"

    From: "Randy Bush" <randy at psg.com>
    Subject: test 2
    To: "Randy Bush" <randy at psg.com>
    Date: Tue, 12 Jan 2021 14:07:24 -0800