How can i check email delivery history for subscriptions in metabase?

I am using metabase pro version (trial version) self hosted, How can i check email logs ? Like whom did metabase sent email till now and when it did

That's gonna be hard to extract. You can use the usage analytics to get an idea of the current subs and to who they send to:

But i think your best bet would be the Alerts Model in that same usage analytics section

Do you store instance logs? Or they get refreshed every-time you restart metabase?

Instance logs gets refreshed when we restart metabase , thats why I guess now my usage analytics is also empty

hmmmmmmmm no usage analytics uses your Application Database Data ... I asked about the logs to see the alerts triggering in the logs.

You're using Postgres/MySQL as your App DB?

Yes Postgres DB

Use a 3rd party SMTP server (I use SMTP2Go). Then you have all the history in the logs.