hello, anyone knows how can I check who/what triggers this bulk subscription email?: Thanks!

Probably a saved search email

I tried but doesn't have option to include who/what triggers the email. it show the author as the Johndoe generic email

Create a saved search on saved search with the subject as the one seen in the pic. Find that search. See for which record it is. Then check the workflow / scripts deployed on that record. You will probably find the root cause.

thanks for the input. However, there's no results when I did saved search search with that criteria.

Can you also download your suitescript folder. And then use any IDE (like VS code) and then do a global search for that author's email / internal Id or the subject and see if anything comes up. Otherwise there is a chance that it might be coming from some locked bundle / script. Mail might be coming from some schedule/ MR script as well. Also check in the templates if you find a template that matches it then check for that template Id in the scripts.

appreciate the inputs. I'll check on it. Thanks!