SRM, DSM and certificates

[Tomasz]

Dears,

I'm looking for help and some explanation how to...
My configuration:
external ip is dynamic (no option for static)
synology router (lets encrypt cert generated)
synology nas (with web and network disks, certificate generated)

Domain from nazwa.pl (domain provider)
Mail by google workspace.
MX records filled with google addresses (and it works).

Domain sent to no-ip. No-ip blocking account because violating terms. In mails some info about malicious...
All hardware in my network is clear, no viruses, nothing suspicious

How to figure out this setup?
Should I have only one certificate for SRM and DSM?

Can anyone give me some advices?

Regards,
Tomasz

 

[fredbert]

It’s not clear how No-IP and emails relate to each other, and what is blocking and if that’s the info about ‘malicious…’

If you’re emailing from the NAS’s Mail Server using ‘from’ your domain, have you added an SFP record to your domain?

https://www.cloudflare.com/en-gb/learning/dns/dns-records/dns-spf-record/