On 11/5/25 11:17, dap1--- via Mailman-users wrote:
Sorry Mark:

These hundreds of emails are distracting and I have too many irons in the fire 
between you and Stephen. That is not a criticism as I greatly appreciate the 
help from both of you. Just that I'm having difficulty keeping up with you both.
```
sudo grep -r '/usr/share/mailman3-web/manage.py' /etc/cron* /var/spool/cron

/etc/cron.d/mailman3-web:* *     * * *      www-data     [ -f /usr/bin/django-admin ] 
&& flock -n /v
ar/run/mailman3-web/cron.minutely /usr/share/mailman3-web/manage.py runjobs 
minutely
/etc/cron.d/mailman3-web:2,17,32,47 * * * * www-data     [ -f /usr/bin/django-admin ] 
&& flock -n /v
ar/run/mailman3-web/cron.quarter_hourly /usr/share/mailman3-web/manage.py 
runjobs quarter_hourly
/etc/cron.d/mailman3-web:@hourly            www-data     [ -f /usr/bin/django-admin ] 
&& flock -n /v
ar/run/mailman3-web/cron.hourly /usr/share/mailman3-web/manage.py runjobs hourly
/etc/cron.d/mailman3-web:@daily             www-data     [ -f /usr/bin/django-admin ] 
&& flock -n /v
ar/run/mailman3-web/cron.daily /usr/share/mailman3-web/manage.py runjobs daily
/etc/cron.d/mailman3-web:@weekly            www-data     [ -f /usr/bin/django-admin ] 
&& flock -n /v
ar/run/mailman3-web/cron.weekly /usr/share/mailman3-web/manage.py runjobs weekly
/etc/cron.d/mailman3-web:@monthly           www-data     [ -f /usr/bin/django-admin ] 
&& flock -n /v
ar/run/mailman3-web/cron.monthly /usr/share/mailman3-web/manage.py runjobs 
monthly
/etc/cron.d/mailman3-web:@yearly            www-data     [ -f /usr/bin/django-admin ] 
&& flock -n /v
ar/run/mailman3-web/cron.yearly /usr/share/mailman3-web/manage.py runjobs yearly
```

This is not the crontab you reported at https://lists.mailman3.org/archives/list/[email protected]/message/6WKLM7ARWJ6KW374UUJFTUYSUJV7JNSY/

That one is probably /var/spool/cron/crontabs/mailman and wouldn't show here because it doesn't contain '/usr/share/mailman3-web/manage.py'.

So the system crontab at /etc/cron.d/mailman3-web is your issue and should be removed. That will get rid of the cron failure emails.

This was a fresh install of Ubuntu server so the only packages installed so far 
are dump/restore, Ubuntu-desktop, MySQL, Postfix, fetchmail and mailman3. 
Apache2 comes preinstalled with Ubuntu but there may be others of which I am 
currently unaware. As far as I know the only other crontab is for root where I 
have the backup jobs scheduled.

0 3 * * 0 /usr/local/sbin/sysbackup

Then the remaining question is how did that crontab get there in the system crontabs. The only way I know it could have gotten there if you didn't manually create it is via installation of Ubuntu Mailman packages.

I think you probably also have a django-admin and perhaps other things in /usr/bin/ and also a /usr/share/mailman-web/ directory which you don't want or need.

I suggest you do

sudo apt list mailman3 mailman3-web mailman3-full mailman3-doc

and see which of those unwanted packages are installed, and if any, `sudo apt remove` them.

--
Mark Sapiro <[email protected]>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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