For emails over 7 rolling hours, unless you're e.g. Google or Microsoft, you kinda have to, otherwise those systems will automatically shadowban (send-to-spam) you for excessive/abnormal email sending rates. It's not great.
It also doesn't help that a lot of scammers use this, or fake cyber incidents, for phishing; so it's not like they have an easy solution for exempting "security emails" either.
It also doesn't help that a lot of scammers use this, or fake cyber incidents, for phishing; so it's not like they have an easy solution for exempting "security emails" either.