Re: qmail unable to chdir to Maildir after Debian upgrade to 'buster'

> On 2019-08-06 20:02-0400, hobie of RMN wrote:
>> Since a very recent upgrade by Debian that moved release 'buster' to
>> 'stable', incoming mail can't be delivered, generates the error
>> message that qmail now is unable to change to the Maildirs that are
>> several levels below /home/vpopmail.  All file permissions appear
>> unchanged.  Any idea how to fix this?  Thanks kindly.
>
> Can you strace the qmail-send and watch what it is doing up to the
> error? It might give some clues. What is the exact error from the
> delivery log?

Thanks. :) Log entry:

 delivery 94: deferral: Unable_to_chdir_to_maildir._(#4.2.1)/

strace is installed but I've never used it.  Is it possible to strace an
already-running process?  I'd need directions on how to do it.

--hobie