I have a question with contact emails flood limit which is present in contact.settings.yml, the limit is going to for whole system(application-wide) or is it going to limit the number of emails per individual user or IP?
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It is IP based as per the answer here drupal.org/project/forward/issues/3034829 – codewriter Aug 9 '19 at 12:27
As you can see its number of emails a user can send in an hour
You can specify the text to display on your site-wide contact page and you can optionally limit how many times a user can submit a contact form in an hour.
btw, its defaults that you can override per any contact form . for example :
contact.settings.yml
default_form: feedback
flood:
limit: 5
interval: 3600
user_default_enabled: true