It ends with
@sotirone said in 1200 DynDNS Email Notifications Every Night:
Sep 17 17:36:11 php-fpm 75704 /services_dyndns_edit.php: phpDynDNS (): No change in my IP address and/or 25 days has not passed. Not updating dynamic DNS
so the file contains the same IP as the actual WAN IP
and
the file date is younger as 25 days from now.
So there is nothing to do : all looks fine.
Another look at :
Sep 17 17:39:07 php 8219 notify_monitor.php: Message sent to email redacted OK
The mail gets send, but some failure stops the mail from getting de-queued - and it will get send again.
So not a dynsds issue, as no further dyndns log lines are shown, but a notification system issue.