Bounced Messages -- LDA / Dovecot / Postfix

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Bounced Messages -- LDA / Dovecot / Postfix

I am not totally even sure this is a Postfix issue, but since the error
is presented as "postfix" and I was not able to find answer elsewhere I
thought I would ask here.

I recently discovered that delivery of bounced messages is not working.  
Of course as no messages were being delivered I thought everything was

Anyway, I am seeing this error in my maillog file:

Mar 29 10:48:09 firewall postfix/pipe[9089]: 19565807:
to=<[hidden email]>, relay=dovecot, delay=0.11,
delays=0.02/0.01/0/0.08, dsn=5.3.0, status=bounced (command line usage
error. Command output: lda: Fatal: Invalid -f parameter: Missing domain

 From other on-line searches, I have seen that this might be a dovecot
issue and possible lda configuration.  Unfortunately, I was not able to
find a resolution.

My postfix configurtion for dovecot looks like the following (in

dovecot   unix  -       n       n       -       -       pipe
    flags=DRhu user=vmail:vmail argv=/usr/libexec/dovecot/deliver -f
${sender} -d ${recipient}

I don't know if the "Invalid -f parameter" is referring to this
configuration or not.  This configuration has not changed since original
configuration.  Again, I saw a blurb that this might be related to
dovecot-2.3.0 upgrade, but again I was not able to find a solution.

I am hoping someone on this list who is running a postfix/dovecot
environment has maybe seen this error and knows the solution.

Thank You