Emails not arriving on e/email

I use nextcloud storage with e/foundations e/os
since this afternoon suddenly my emails dont arrive.
some syncing problem?
Ive tried sending to my account from multiple accounts but I dont receive anything

thanks ,

In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:

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Nextcloud version (eg, 20.0.5): replace me
Operating system and version (eg, Ubuntu 20.04): replace me
Apache or nginx version (eg, Apache 2.4.25): replace me
PHP version (eg, 7.4): replace me

The issue you are facing:

Is this the first time you’ve seen this error? (Y/N):

Steps to replicate it:

The output of your Nextcloud log in Admin > Logging:

PASTE HERE

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

PASTE HERE

The output of your Apache/nginx/system log in /var/log/____:

PASTE HERE

What happened this afternoon?

You didn’t fill in the template. On top of that, do you use a dedicated mail account to send out mails? Do you send it directly (smtp) from Nextcloud, do you go through ssmtp or something (they have better logging in case of problems). If it is a dedicated mail account, the account is not blocked or anything like that?