I need some help interpreting this error

[2QdxY4RzWzUUiLuE at potatochowder.com]

On 2021-02-17 at 16:52:55 +0000,
Chris Green <cl at isbd.net> wrote:

> Stefan Ram <ram at zedat.fu-berlin.de> wrote:
> > Chris Green <cl at isbd.net> writes:
> > >But msghdr["subject"] is surely just a string isn't it?  Why is it 
> > >complaining about something of type 'Header'?
> > 
> >   What would you do to debug-print the type of an object?
> > 
> I don't know, what would I do?  :-)
> 
> Without knowing what provokes the problem I could be waiting for days
> or weeks even before I see the error again.  As I'd need to print the
> type for every message I'd get some big logs or I'd need to add a try:
> except to trap the specific error.

An intermittent problem!  They're our favorite!  ;-)

Seriously, though, do you have a message that provokes the problem?  Is
there a log at all?  Can you re-run that message through the code, in a
debugger or otherwise?