Jeff said:
Outlook isn't having a problem sending the reply via any of my
accounts, so I don't understand your point.
You said:
When I reply, my default account is usually selected automatically,
but sometimes one of my non-default accounts is selected. The latter
really puzzles me.
I was addressing this. It's a sign that, indeed, for that message, Outlook
could not send the message on the acount you selected and it used a
different account. This is an Outlook account to which I refer, not an ISP
account.
When I receive an email
via my SFF account, I simply want Outlook to automatically select the
SFF account when I click Reply on the received email.
Either I don't understand your setup or you're confusing Outlook's concept
of an account with the email addresses your ISP(s) supply. They're not the
same thing. You told me that both of your mail addresses get dumped into a
single mailbox and that you download the messages from there using a single
set up ISP credentials. Outlook, therefore, is aware of only one account
(i.e., mailbox) and there's no distinction between the the addresses as far
as Outlook is concerned, so it can't automatically chose another address,
since the mail wasn't received from distinct mailbox associated with the
other address.