# Buggy code
def viewmail(request, mail_id):
    rcpt = request.GET["rcpt"]
    if request.user.mailbox_set.count():
        mb = Mailbox.objects.get(user=request.user)
        if rcpt in mb.alias_addresses:
            msgrcpt = get_wrapper().get_recipient_message(rcpt, mail_id)
            msgrcpt.rs = "V"
            msgrcpt.save()

    content = Template("""
<iframe src="{{ url }}" id="mailcontent"></iframe>
""").render(Context({"url": reverse(getmailcontent, args=[mail_id])}))
    menu = viewm_menu(mail_id, rcpt)
    ctx = getctx("ok", menu=menu, listing=content)
    request.session["location"] = "viewmail"
    return render_to_json_response(ctx)


# Traceback (IntegrityError)
Internal Server Error: /quarantine/process/
Traceback (most recent call last):
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
response = callback(request, *callback_args, **callback_kwargs)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 25, in _wrapped_view
return view_func(request, *args, **kwargs)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/modoboa/extensions/amavis/views.py", line 307, in process
return release(request, ids)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/modoboa/extensions/amavis/lib.py", line 30, in wrapped_f
return f(request, *args, **kwargs)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/modoboa/extensions/amavis/views.py", line 282, in release
rcpt.save()
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/base.py", line 546, in save
force_update=force_update, update_fields=update_fields)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/base.py", line 626, in save_base
rows = manager.using(using).filter(pk=pk_val)._update(values)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/query.py", line 605, in _update
return query.get_compiler(self.db).execute_sql(None)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 1020, in execute_sql
cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 846, in execute_sql
cursor.execute(sql, params)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/backends/util.py", line 41, in execute
return self.cursor.execute(sql, params)
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 122, in execute
six.reraise(utils.IntegrityError, utils.IntegrityError(*tuple(e.args)), sys.exc_info()[2])
File "/srv/modoboa/python-virtualenv-modoboa-1.1.1/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 120, in execute
return self.cursor.execute(query, args)
File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 174, in execute
self.errorhandler(self, exc, value)
File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
raise errorclass, errorvalue
IntegrityError: (1062, "Duplicate entry '0-NTFOxSLhytYl-1' for key 'PRIMARY'")

# Fixed code
def viewmail(request, mail_id):
    rcpt = request.GET["rcpt"]
    if request.user.mailbox_set.count():
        mb = Mailbox.objects.get(user=request.user)
        if rcpt in mb.alias_addresses:
            get_wrapper().set_msgrcpt_status(rcpt, mail_id, "V")

    content = Template("""
<iframe src="{{ url }}" id="mailcontent"></iframe>
""").render(Context({"url": reverse(getmailcontent, args=[mail_id])}))
    menu = viewm_menu(mail_id, rcpt)
    ctx = getctx("ok", menu=menu, listing=content)
    request.session["location"] = "viewmail"
    return render_to_json_response(ctx)