[mlmmj] Trying to use moderation, but email server is rejecting moderator's release reply to list-ow

I've been using MLMMJ for years with several closed lists, and it works
great! Can't say enough good things about it.

Now I have finally reached a place where I need moderation on a list, so
I implemented the two files [list]/control/moderated and
[list]/control/moderators.

Tested some email submissions, and as expected they were sent to the
moderators for release or rejection...So far so good...

But when I reply to the moderation notice to release the original email
to the list, it's sent back to a pseudo-email address (the reply-to
address) like:

[list name][email protected]

(list name obviscated above)

Our email server doesn't recognize this as a real email account so it's
bouncing back my "release" response with the usual "Unknown user"
bounce-back.

I tried reply-all, which also included the [list][email protected]
address, and the email server still bounced the reply.

I've re-read the docs but can't find anything pointing to additional
steps needed to get the moderation-release replies to get past my email
server's filtering of non-existent addresses.  I doubt I'm supposed to
simply add these address accounts to the email server, not least because
there's no nothing to that effect in the documentation.

How is this email-reply moderation process supposed to work when sending
pseudo-addresses to my email server, which is correctly rejecting such
incoming mail as directed to a non-existing account?

Philip

I've been using MLMMJ for
years with several closed lists, and it works great! Can't say
enough good things about it.

Now I have finally reached a place where I need moderation on a
list, so I implemented the two files [list]/control/moderated and
[list]/control/moderators.

Tested some email submissions, and as expected they were sent to
the moderators for release or rejection...So far so good...

But when I reply to the moderation notice to release the
original email to the list, it's sent back to a pseudo-email
address
(the reply-to address) like:

[list name][email protected]

(list name obviscated above)

Our email server doesn't recognize this as a real email account
so it's bouncing back my "release" response with the usual
"Unknown user" bounce-back.

I tried reply-all, which also included the [list][email protected]
address, and the email server still bounced the reply.

I've re-read the docs but can't find anything pointing to
additional steps needed to get the moderation-release replies to
get past my email server's filtering of non-existent addresses.
I doubt I'm supposed to simply add these address accounts to the
email server, not least because there's no nothing to that
effect in the documentation.

How is this email-reply moderation process supposed to work when
sending pseudo-addresses to my email server, which is correctly
rejecting such incoming mail as directed to a non-existing
account?

Philip