This problem has been going on several months so I don't know what might have
triggered it.

I use OE 6.00.29 to send and receive a number of accounts. Each has been
set up with the proper email address and reply address for the alias. The
email addresses cover different servers. However, no matter which account I
specify as the "From" account, it always defaults to another account (always
the same default account). Note that the reply (originating) account that it
defaults to is NOT the default account.

Thus I send a message from Jrsdad1234.domain.net and when the recipient
replies it goes to Info1234.domain.net, another one of my accounts. When I
delete the Info1234 account, the source and reply email address shifts to
another account.

I first noticed this when I saw that people from my private emails were
responding to my business emails. This has cause confusion and consternation.

I have ported, through Files & Settings wizard, these accounts several times
over the years. How can I make it so when I send an email, the recipient
gets it as coming from the account I tried to send it from? I should note
that the body of the email shows it as coming from the account I sent it
from, but when they reply it goes to the odd default account.

I have deleted the spurious default account only to have another of my
addresses become the hidden default reply address (again noting that this is
not related to which account is listed under tools/accounts as default).

Any help would be appreciated. Thanks!