Found out just now what the problem was.
I am writing this to help others: the federation was active in that instance but it was also marked as a private instance. This gave no problems in using it until the update (probably because it is restarted and re-run Docker).
I removed the federation from the config file leaving only the private instance and it restarted immediately.
yes, actually i tried ‘none’, ‘tls’ and ‘starttls’ but with no success. I tried with external SMTP because the default created by ansible does not work:
email: {
smtp_server: "postfix:25"
smtp_from_address: "noreply@mydomain.it"
tls_type: "none"
}
It is the same thing that I thought. Unfortunately, if I try to manually force the port by writing smtps.aruba.it:465 as I said the server freezes for several minutes, goes to 504 and does not send any email.
So I can not understand if the port must be entered in another way (?) or if I have to install something on the server first to be able to send an email through an external SMTP as in this case?
Thanks, will try it 👍