# Spam mail every 10 minutes
**URL:** https://forum.yunohost.org/t/spam-mail-every-10-minutes/26158
**Category:** Support
**Tags:** english
**Created:** [August 29, 2023, 2:22pm UTC](https://forum.yunohost.org/t/spam-mail-every-10-minutes/26158 "2023-08-29T14:22:57Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@erikkemp](https://forum.yunohost.org/u/erikkemp)
#### Post date: [August 29, 2023, 2:22pm UTC](https://forum.yunohost.org/t/spam-mail-every-10-minutes/26158/1 "2023-08-29T14:22:57Z")
### My YunoHost server
**Hardware:** VPS bought online
**YunoHost version:** 11.2.3
**I have access to my server :** Through SSH | through the webadmin
**Are you in a special context or did you perform some particular tweaking on your YunoHost instance ?** : no
### Description of my issue
Dear yunohost wizards, I somehow get this email every 10 minutes: [Cron](https://forum.yunohost.org/t/cron-root-mms-root-yunohost-dyndns-update-sleep-random-60-ping-q-w5-c1-ip-yunohost-org-dev-null-2-1-test-e-var-run-moulinette-yunohost-lock-yunohost-dyndns-update-dev-null/22161)[root@mms](mailto:root@mms) \* \* \* \* root : YunoHost DynDNS update; sleep $((RANDOM%60)); ! ping -q -W5 -c1 [ip.yunohost.org](http://ip.yunohost.org) \>/dev/null 2\>&1 || test -e /var/run/moulinette\_yunohost.lock || yunohost dyndns update \>\> /dev/null
No domain registered with DynDNS
I’m not sure why and I didn’t see a reply on how to solve it on related threads.
And then there is a mail 2 showing:
" Undelivered Mail Returned to Sender".
\<[admin@yunohost.erikkemp.eu](mailto:admin@yunohost.erikkemp.eu)\> (expanded from ): user unknown
With attachment:
Reporting-MTA: dns; yunohost.erikkemp.eu
X-Postfix-Queue-ID: 2A4AB60DCA
X-Postfix-Sender: rfc822; root@yunohost.erikkemp.eu
Arrival-Date: Tue, 29 Aug 2023 16:00:33 +0200 (CEST)
Final-Recipient: rfc822; admin@yunohost.erikkemp.eu
Original-Recipient: rfc822;root@yunohost.erikkemp.eu
Action: failed
Status: 5.1.1
Diagnostic-Code: x-unix; user unknown
Help much appreciated 🙂
Kind regards from the Netherlands, Erik
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### Author:  [@CatsLover71](https://forum.yunohost.org/u/CatsLover71)
#### Post date: [September 6, 2023, 2:30pm UTC](https://forum.yunohost.org/t/spam-mail-every-10-minutes/26158/2 "2023-09-06T14:30:24Z")
Hello Erik,
I don’t use DynDNS so I don’t know much. But you can search in /etc/cron(something) (there is cron.d folder, crontab, cron.hourly, cron.daily, … which cron job is running every 10 minutes.
What is strange is that it tells you that admin@YOURDOMAIN.tld doesn’t exist. Normally, the first user you created (and all users in admins group should get the emails to admin@…) .
And for cron syntax, this site is useful to help understand it : [https://cron.help/](https://cron.help/)
Hope you gonna manage to silence this annoying mail.
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### Author:  [@system](https://forum.yunohost.org/u/system)
#### Post date: [October 6, 2023, 2:31pm UTC](https://forum.yunohost.org/t/spam-mail-every-10-minutes/26158/3 "2023-10-06T14:31:15Z")
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