SEE PHISHING | REPORT PHISHING
The APWG collects, analyzes, and exchanges lists of verified credential collection sites, like those used in phishing. If you have received a suspicious or obviously malicious email you can forward those to APWG for analysis.
The best way to do this is to simply forward the suspected phishing email to email@example.com.
If your email clients supports the option to "Forward As Attachment" this will provide our systems more details for tracking.